Home / 128,631.28-177,507.04-71,268.24

Finding the Fourth Proportional to 128,631.28, 177,507.04 and 71,268.24

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Solution

The fourth proportional to 128,631.28, 177,507.04 and 71,268.24 is: 98,347.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,631.28 : 177,507.04 = 71,268.24 : x
  2. Step 2: Convert to fraction form
    128,631.28/177,507.04 = 71,268.24/x
  3. Step 3: Cross multiply
    128,631.28x = 177,507.04 × 71,268.24
  4. Step 4: Simplify right side
    128,631.28x = 12,650,614,328.41
  5. Step 5: Solve for x
    x = 12,650,614,328.41/128,631.28
  6. Step 6: Final answer
    x = 98,347.88

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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.