Home / 102,439.48-141,356.15-57,113.20

Finding the Fourth Proportional to 102,439.48, 141,356.15 and 57,113.20

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Solution

The fourth proportional to 102,439.48, 141,356.15 and 57,113.20 is: 78,810.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,439.48 : 141,356.15 = 57,113.20 : x
  2. Step 2: Convert to fraction form
    102,439.48/141,356.15 = 57,113.20/x
  3. Step 3: Cross multiply
    102,439.48x = 141,356.15 × 57,113.20
  4. Step 4: Simplify right side
    102,439.48x = 8,073,301,073.83
  5. Step 5: Solve for x
    x = 8,073,301,073.83/102,439.48
  6. Step 6: Final answer
    x = 78,810.45

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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.