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Finding the Fourth Proportional to 103,641.40, 155,346.90 and 56,927.80

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Solution

The fourth proportional to 103,641.40, 155,346.90 and 56,927.80 is: 85,328.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,641.40 : 155,346.90 = 56,927.80 : x
  2. Step 2: Convert to fraction form
    103,641.40/155,346.90 = 56,927.80/x
  3. Step 3: Cross multiply
    103,641.40x = 155,346.90 × 56,927.80
  4. Step 4: Simplify right side
    103,641.40x = 8,843,557,253.82
  5. Step 5: Solve for x
    x = 8,843,557,253.82/103,641.40
  6. Step 6: Final answer
    x = 85,328.42

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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.