Home / 129,439.02-178,584.14-72,839.46

Finding the Fourth Proportional to 129,439.02, 178,584.14 and 72,839.46

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Solution

The fourth proportional to 129,439.02, 178,584.14 and 72,839.46 is: 100,494.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,439.02 : 178,584.14 = 72,839.46 : x
  2. Step 2: Convert to fraction form
    129,439.02/178,584.14 = 72,839.46/x
  3. Step 3: Cross multiply
    129,439.02x = 178,584.14 × 72,839.46
  4. Step 4: Simplify right side
    129,439.02x = 13,007,972,322.16
  5. Step 5: Solve for x
    x = 13,007,972,322.16/129,439.02
  6. Step 6: Final answer
    x = 100,494.98

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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.