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Finding the Fourth Proportional to 57,715.60, 86,573.40 and 40,000.90

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Solution

The fourth proportional to 57,715.60, 86,573.40 and 40,000.90 is: 60,001.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,715.60 : 86,573.40 = 40,000.90 : x
  2. Step 2: Convert to fraction form
    57,715.60/86,573.40 = 40,000.90/x
  3. Step 3: Cross multiply
    57,715.60x = 86,573.40 × 40,000.90
  4. Step 4: Simplify right side
    57,715.60x = 3,463,013,916.06
  5. Step 5: Solve for x
    x = 3,463,013,916.06/57,715.60
  6. Step 6: Final answer
    x = 60,001.35

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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.