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Finding the Fourth Proportional to 71,505.18, 107,266.28 and 18,915.12

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Solution

The fourth proportional to 71,505.18, 107,266.28 and 18,915.12 is: 28,374.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,505.18 : 107,266.28 = 18,915.12 : x
  2. Step 2: Convert to fraction form
    71,505.18/107,266.28 = 18,915.12/x
  3. Step 3: Cross multiply
    71,505.18x = 107,266.28 × 18,915.12
  4. Step 4: Simplify right side
    71,505.18x = 2,028,954,463.58
  5. Step 5: Solve for x
    x = 2,028,954,463.58/71,505.18
  6. Step 6: Final answer
    x = 28,374.93

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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.