Home / 129,001.34-178,023.60-71,644.36

Finding the Fourth Proportional to 129,001.34, 178,023.60 and 71,644.36

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Solution

The fourth proportional to 129,001.34, 178,023.60 and 71,644.36 is: 98,870.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,001.34 : 178,023.60 = 71,644.36 : x
  2. Step 2: Convert to fraction form
    129,001.34/178,023.60 = 71,644.36/x
  3. Step 3: Cross multiply
    129,001.34x = 178,023.60 × 71,644.36
  4. Step 4: Simplify right side
    129,001.34x = 12,754,386,840.76
  5. Step 5: Solve for x
    x = 12,754,386,840.76/129,001.34
  6. Step 6: Final answer
    x = 98,870.19

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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.