Home / 129,207.48-178,284.60-71,845.16

Finding the Fourth Proportional to 129,207.48, 178,284.60 and 71,845.16

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Solution

The fourth proportional to 129,207.48, 178,284.60 and 71,845.16 is: 99,134.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,207.48 : 178,284.60 = 71,845.16 : x
  2. Step 2: Convert to fraction form
    129,207.48/178,284.60 = 71,845.16/x
  3. Step 3: Cross multiply
    129,207.48x = 178,284.60 × 71,845.16
  4. Step 4: Simplify right side
    129,207.48x = 12,808,885,612.54
  5. Step 5: Solve for x
    x = 12,808,885,612.54/129,207.48
  6. Step 6: Final answer
    x = 99,134.24

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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.