Home / 129,513.22-178,725.53-72,152.46

Finding the Fourth Proportional to 129,513.22, 178,725.53 and 72,152.46

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Solution

The fourth proportional to 129,513.22, 178,725.53 and 72,152.46 is: 99,568.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,513.22 : 178,725.53 = 72,152.46 : x
  2. Step 2: Convert to fraction form
    129,513.22/178,725.53 = 72,152.46/x
  3. Step 3: Cross multiply
    129,513.22x = 178,725.53 × 72,152.46
  4. Step 4: Simplify right side
    129,513.22x = 12,895,487,504.91
  5. Step 5: Solve for x
    x = 12,895,487,504.91/129,513.22
  6. Step 6: Final answer
    x = 99,568.89

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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.