Home / 128,764.16-177,691.26-71,402.57

Finding the Fourth Proportional to 128,764.16, 177,691.26 and 71,402.57

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Solution

The fourth proportional to 128,764.16, 177,691.26 and 71,402.57 is: 98,533.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,764.16 : 177,691.26 = 71,402.57 : x
  2. Step 2: Convert to fraction form
    128,764.16/177,691.26 = 71,402.57/x
  3. Step 3: Cross multiply
    128,764.16x = 177,691.26 × 71,402.57
  4. Step 4: Simplify right side
    128,764.16x = 12,687,611,385.07
  5. Step 5: Solve for x
    x = 12,687,611,385.07/128,764.16
  6. Step 6: Final answer
    x = 98,533.72

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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.