Home / 129,575.16-178,811.02-72,219.72

Finding the Fourth Proportional to 129,575.16, 178,811.02 and 72,219.72

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Solution

The fourth proportional to 129,575.16, 178,811.02 and 72,219.72 is: 99,661.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,575.16 : 178,811.02 = 72,219.72 : x
  2. Step 2: Convert to fraction form
    129,575.16/178,811.02 = 72,219.72/x
  3. Step 3: Cross multiply
    129,575.16x = 178,811.02 × 72,219.72
  4. Step 4: Simplify right side
    129,575.16x = 12,913,681,797.31
  5. Step 5: Solve for x
    x = 12,913,681,797.31/129,575.16
  6. Step 6: Final answer
    x = 99,661.71

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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.