Home / 103,624.10-155,436.15-72,131.30

Finding the Fourth Proportional to 103,624.10, 155,436.15 and 72,131.30

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Solution

The fourth proportional to 103,624.10, 155,436.15 and 72,131.30 is: 108,196.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,624.10 : 155,436.15 = 72,131.30 : x
  2. Step 2: Convert to fraction form
    103,624.10/155,436.15 = 72,131.30/x
  3. Step 3: Cross multiply
    103,624.10x = 155,436.15 × 72,131.30
  4. Step 4: Simplify right side
    103,624.10x = 11,211,811,566.50
  5. Step 5: Solve for x
    x = 11,211,811,566.50/103,624.10
  6. Step 6: Final answer
    x = 108,196.95

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.