Home / 100,957.32-139,321.65-57,933.39

Finding the Fourth Proportional to 100,957.32, 139,321.65 and 57,933.39

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Solution

The fourth proportional to 100,957.32, 139,321.65 and 57,933.39 is: 79,948.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,957.32 : 139,321.65 = 57,933.39 : x
  2. Step 2: Convert to fraction form
    100,957.32/139,321.65 = 57,933.39/x
  3. Step 3: Cross multiply
    100,957.32x = 139,321.65 × 57,933.39
  4. Step 4: Simplify right side
    100,957.32x = 8,071,375,702.14
  5. Step 5: Solve for x
    x = 8,071,375,702.14/100,957.32
  6. Step 6: Final answer
    x = 79,948.40

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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.