Home / 128,937.52-177,934.07-71,577.68

Finding the Fourth Proportional to 128,937.52, 177,934.07 and 71,577.68

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Solution

The fourth proportional to 128,937.52, 177,934.07 and 71,577.68 is: 98,777.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,937.52 : 177,934.07 = 71,577.68 : x
  2. Step 2: Convert to fraction form
    128,937.52/177,934.07 = 71,577.68/x
  3. Step 3: Cross multiply
    128,937.52x = 177,934.07 × 71,577.68
  4. Step 4: Simplify right side
    128,937.52x = 12,736,107,565.67
  5. Step 5: Solve for x
    x = 12,736,107,565.67/128,937.52
  6. Step 6: Final answer
    x = 98,777.36

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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.