Home / 128,500.02-177,330.26-71,143.31

Finding the Fourth Proportional to 128,500.02, 177,330.26 and 71,143.31

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Solution

The fourth proportional to 128,500.02, 177,330.26 and 71,143.31 is: 98,177.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,500.02 : 177,330.26 = 71,143.31 : x
  2. Step 2: Convert to fraction form
    128,500.02/177,330.26 = 71,143.31/x
  3. Step 3: Cross multiply
    128,500.02x = 177,330.26 × 71,143.31
  4. Step 4: Simplify right side
    128,500.02x = 12,615,862,280.74
  5. Step 5: Solve for x
    x = 12,615,862,280.74/128,500.02
  6. Step 6: Final answer
    x = 98,177.90

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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.