Home / 128,370.92-177,138.23-71,001.12

Finding the Fourth Proportional to 128,370.92, 177,138.23 and 71,001.12

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Solution

The fourth proportional to 128,370.92, 177,138.23 and 71,001.12 is: 97,974.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,370.92 : 177,138.23 = 71,001.12 : x
  2. Step 2: Convert to fraction form
    128,370.92/177,138.23 = 71,001.12/x
  3. Step 3: Cross multiply
    128,370.92x = 177,138.23 × 71,001.12
  4. Step 4: Simplify right side
    128,370.92x = 12,577,012,902.32
  5. Step 5: Solve for x
    x = 12,577,012,902.32/128,370.92
  6. Step 6: Final answer
    x = 97,974.01

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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.