Home / 129,319.13-178,458.66-72,730.51

Finding the Fourth Proportional to 129,319.13, 178,458.66 and 72,730.51

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Solution

The fourth proportional to 129,319.13, 178,458.66 and 72,730.51 is: 100,367.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,319.13 : 178,458.66 = 72,730.51 : x
  2. Step 2: Convert to fraction form
    129,319.13/178,458.66 = 72,730.51/x
  3. Step 3: Cross multiply
    129,319.13x = 178,458.66 × 72,730.51
  4. Step 4: Simplify right side
    129,319.13x = 12,979,388,909.57
  5. Step 5: Solve for x
    x = 12,979,388,909.57/129,319.13
  6. Step 6: Final answer
    x = 100,367.12

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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.