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Finding the Fourth Proportional to 61,438.88, 91,983.36 and 40,356.20

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Solution

The fourth proportional to 61,438.88, 91,983.36 and 40,356.20 is: 60,419.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,438.88 : 91,983.36 = 40,356.20 : x
  2. Step 2: Convert to fraction form
    61,438.88/91,983.36 = 40,356.20/x
  3. Step 3: Cross multiply
    61,438.88x = 91,983.36 × 40,356.20
  4. Step 4: Simplify right side
    61,438.88x = 3,712,098,872.83
  5. Step 5: Solve for x
    x = 3,712,098,872.83/61,438.88
  6. Step 6: Final answer
    x = 60,419.38

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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.