Home / 128,339.28-177,113.52-71,750.52

Finding the Fourth Proportional to 128,339.28, 177,113.52 and 71,750.52

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Solution

The fourth proportional to 128,339.28, 177,113.52 and 71,750.52 is: 99,018.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,339.28 : 177,113.52 = 71,750.52 : x
  2. Step 2: Convert to fraction form
    128,339.28/177,113.52 = 71,750.52/x
  3. Step 3: Cross multiply
    128,339.28x = 177,113.52 × 71,750.52
  4. Step 4: Simplify right side
    128,339.28x = 12,707,987,159.03
  5. Step 5: Solve for x
    x = 12,707,987,159.03/128,339.28
  6. Step 6: Final answer
    x = 99,018.69

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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.