Home / 129,395.97-178,566.06-72,807.35

Finding the Fourth Proportional to 129,395.97, 178,566.06 and 72,807.35

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Solution

The fourth proportional to 129,395.97, 178,566.06 and 72,807.35 is: 100,473.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,395.97 : 178,566.06 = 72,807.35 : x
  2. Step 2: Convert to fraction form
    129,395.97/178,566.06 = 72,807.35/x
  3. Step 3: Cross multiply
    129,395.97x = 178,566.06 × 72,807.35
  4. Step 4: Simplify right side
    129,395.97x = 13,000,920,735.71
  5. Step 5: Solve for x
    x = 13,000,920,735.71/129,395.97
  6. Step 6: Final answer
    x = 100,473.92

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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.