Home / 129,488.60-178,693.62-72,900.38

Finding the Fourth Proportional to 129,488.60, 178,693.62 and 72,900.38

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Solution

The fourth proportional to 129,488.60, 178,693.62 and 72,900.38 is: 100,602.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,488.60 : 178,693.62 = 72,900.38 : x
  2. Step 2: Convert to fraction form
    129,488.60/178,693.62 = 72,900.38/x
  3. Step 3: Cross multiply
    129,488.60x = 178,693.62 × 72,900.38
  4. Step 4: Simplify right side
    129,488.60x = 13,026,832,801.58
  5. Step 5: Solve for x
    x = 13,026,832,801.58/129,488.60
  6. Step 6: Final answer
    x = 100,602.16

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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.