Home / 128,289.12-177,044.46-71,700.50

Finding the Fourth Proportional to 128,289.12, 177,044.46 and 71,700.50

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Solution

The fourth proportional to 128,289.12, 177,044.46 and 71,700.50 is: 98,949.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,289.12 : 177,044.46 = 71,700.50 : x
  2. Step 2: Convert to fraction form
    128,289.12/177,044.46 = 71,700.50/x
  3. Step 3: Cross multiply
    128,289.12x = 177,044.46 × 71,700.50
  4. Step 4: Simplify right side
    128,289.12x = 12,694,176,304.23
  5. Step 5: Solve for x
    x = 12,694,176,304.23/128,289.12
  6. Step 6: Final answer
    x = 98,949.75

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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.