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Finding the Fourth Proportional to 57,972.70, 86,937.45 and 40,390.30

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Solution

The fourth proportional to 57,972.70, 86,937.45 and 40,390.30 is: 60,570.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,972.70 : 86,937.45 = 40,390.30 : x
  2. Step 2: Convert to fraction form
    57,972.70/86,937.45 = 40,390.30/x
  3. Step 3: Cross multiply
    57,972.70x = 86,937.45 × 40,390.30
  4. Step 4: Simplify right side
    57,972.70x = 3,511,429,686.74
  5. Step 5: Solve for x
    x = 3,511,429,686.74/57,972.70
  6. Step 6: Final answer
    x = 60,570.40

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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.