Home / 129,020.50-178,042.20-71,663.51

Finding the Fourth Proportional to 129,020.50, 178,042.20 and 71,663.51

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Solution

The fourth proportional to 129,020.50, 178,042.20 and 71,663.51 is: 98,892.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,020.50 : 178,042.20 = 71,663.51 : x
  2. Step 2: Convert to fraction form
    129,020.50/178,042.20 = 71,663.51/x
  3. Step 3: Cross multiply
    129,020.50x = 178,042.20 × 71,663.51
  4. Step 4: Simplify right side
    129,020.50x = 12,759,129,058.85
  5. Step 5: Solve for x
    x = 12,759,129,058.85/129,020.50
  6. Step 6: Final answer
    x = 98,892.27

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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.