Home / 129,432.79-178,615.69-72,072.24

Finding the Fourth Proportional to 129,432.79, 178,615.69 and 72,072.24

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Solution

The fourth proportional to 129,432.79, 178,615.69 and 72,072.24 is: 99,458.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,432.79 : 178,615.69 = 72,072.24 : x
  2. Step 2: Convert to fraction form
    129,432.79/178,615.69 = 72,072.24/x
  3. Step 3: Cross multiply
    129,432.79x = 178,615.69 × 72,072.24
  4. Step 4: Simplify right side
    129,432.79x = 12,873,232,877.45
  5. Step 5: Solve for x
    x = 12,873,232,877.45/129,432.79
  6. Step 6: Final answer
    x = 99,458.82

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1.5x scale

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.