Home / 128,231.25-176,959.20-71,642.63

Finding the Fourth Proportional to 128,231.25, 176,959.20 and 71,642.63

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Solution

The fourth proportional to 128,231.25, 176,959.20 and 71,642.63 is: 98,866.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,231.25 : 176,959.20 = 71,642.63 : x
  2. Step 2: Convert to fraction form
    128,231.25/176,959.20 = 71,642.63/x
  3. Step 3: Cross multiply
    128,231.25x = 176,959.20 × 71,642.63
  4. Step 4: Simplify right side
    128,231.25x = 12,677,821,605.90
  5. Step 5: Solve for x
    x = 12,677,821,605.90/128,231.25
  6. Step 6: Final answer
    x = 98,866.86

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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.