Home / 129,395.46-178,565.37-72,806.84

Finding the Fourth Proportional to 129,395.46, 178,565.37 and 72,806.84

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Solution

The fourth proportional to 129,395.46, 178,565.37 and 72,806.84 is: 100,473.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,395.46 : 178,565.37 = 72,806.84 : x
  2. Step 2: Convert to fraction form
    129,395.46/178,565.37 = 72,806.84/x
  3. Step 3: Cross multiply
    129,395.46x = 178,565.37 × 72,806.84
  4. Step 4: Simplify right side
    129,395.46x = 13,000,780,323.13
  5. Step 5: Solve for x
    x = 13,000,780,323.13/129,395.46
  6. Step 6: Final answer
    x = 100,473.23

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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.