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Finding the Fourth Proportional to 128,753.96, 177,680.84 and 71,397.32

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Solution

The fourth proportional to 128,753.96, 177,680.84 and 71,397.32 is: 98,528.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,753.96 : 177,680.84 = 71,397.32 : x
  2. Step 2: Convert to fraction form
    128,753.96/177,680.84 = 71,397.32/x
  3. Step 3: Cross multiply
    128,753.96x = 177,680.84 × 71,397.32
  4. Step 4: Simplify right side
    128,753.96x = 12,685,935,322.36
  5. Step 5: Solve for x
    x = 12,685,935,322.36/128,753.96
  6. Step 6: Final answer
    x = 98,528.51

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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.