Home / 128,652.25-177,545.75-71,291.43

Finding the Fourth Proportional to 128,652.25, 177,545.75 and 71,291.43

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Solution

The fourth proportional to 128,652.25, 177,545.75 and 71,291.43 is: 98,385.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,652.25 : 177,545.75 = 71,291.43 : x
  2. Step 2: Convert to fraction form
    128,652.25/177,545.75 = 71,291.43/x
  3. Step 3: Cross multiply
    128,652.25x = 177,545.75 × 71,291.43
  4. Step 4: Simplify right side
    128,652.25x = 12,657,490,407.92
  5. Step 5: Solve for x
    x = 12,657,490,407.92/128,652.25
  6. Step 6: Final answer
    x = 98,385.30

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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.