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Finding the Fourth Proportional to 74,438.68, 102,720.52 and 40,902.52

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Solution

The fourth proportional to 74,438.68, 102,720.52 and 40,902.52 is: 56,442.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,438.68 : 102,720.52 = 40,902.52 : x
  2. Step 2: Convert to fraction form
    74,438.68/102,720.52 = 40,902.52/x
  3. Step 3: Cross multiply
    74,438.68x = 102,720.52 × 40,902.52
  4. Step 4: Simplify right side
    74,438.68x = 4,201,528,123.71
  5. Step 5: Solve for x
    x = 4,201,528,123.71/74,438.68
  6. Step 6: Final answer
    x = 56,442.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.