Home / 129,379.39-178,543.52-72,017.47

Finding the Fourth Proportional to 129,379.39, 178,543.52 and 72,017.47

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Solution

The fourth proportional to 129,379.39, 178,543.52 and 72,017.47 is: 99,384.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,379.39 : 178,543.52 = 72,017.47 : x
  2. Step 2: Convert to fraction form
    129,379.39/178,543.52 = 72,017.47/x
  3. Step 3: Cross multiply
    129,379.39x = 178,543.52 × 72,017.47
  4. Step 4: Simplify right side
    129,379.39x = 12,858,251,342.49
  5. Step 5: Solve for x
    x = 12,858,251,342.49/129,379.39
  6. Step 6: Final answer
    x = 99,384.08

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1.5x scale

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.