Home / 128,291.52-177,039.24-71,708.16

Finding the Fourth Proportional to 128,291.52, 177,039.24 and 71,708.16

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Solution

The fourth proportional to 128,291.52, 177,039.24 and 71,708.16 is: 98,955.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,291.52 : 177,039.24 = 71,708.16 : x
  2. Step 2: Convert to fraction form
    128,291.52/177,039.24 = 71,708.16/x
  3. Step 3: Cross multiply
    128,291.52x = 177,039.24 × 71,708.16
  4. Step 4: Simplify right side
    128,291.52x = 12,695,158,148.20
  5. Step 5: Solve for x
    x = 12,695,158,148.20/128,291.52
  6. Step 6: Final answer
    x = 98,955.55

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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.