Home / 103,171.18-155,459.80-84,861.40

Finding the Fourth Proportional to 103,171.18, 155,459.80 and 84,861.40

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Solution

The fourth proportional to 103,171.18, 155,459.80 and 84,861.40 is: 127,870.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,171.18 : 155,459.80 = 84,861.40 : x
  2. Step 2: Convert to fraction form
    103,171.18/155,459.80 = 84,861.40/x
  3. Step 3: Cross multiply
    103,171.18x = 155,459.80 × 84,861.40
  4. Step 4: Simplify right side
    103,171.18x = 13,192,536,271.72
  5. Step 5: Solve for x
    x = 13,192,536,271.72/103,171.18
  6. Step 6: Final answer
    x = 127,870.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.