Home / 129,568.02-178,805.87-72,205.79

Finding the Fourth Proportional to 129,568.02, 178,805.87 and 72,205.79

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Solution

The fourth proportional to 129,568.02, 178,805.87 and 72,205.79 is: 99,645.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,568.02 : 178,805.87 = 72,205.79 : x
  2. Step 2: Convert to fraction form
    129,568.02/178,805.87 = 72,205.79/x
  3. Step 3: Cross multiply
    129,568.02x = 178,805.87 × 72,205.79
  4. Step 4: Simplify right side
    129,568.02x = 12,910,817,844.93
  5. Step 5: Solve for x
    x = 12,910,817,844.93/129,568.02
  6. Step 6: Final answer
    x = 99,645.10

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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.