Home / 128,612.20-177,484.79-71,255.24

Finding the Fourth Proportional to 128,612.20, 177,484.79 and 71,255.24

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Solution

The fourth proportional to 128,612.20, 177,484.79 and 71,255.24 is: 98,332.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,612.20 : 177,484.79 = 71,255.24 : x
  2. Step 2: Convert to fraction form
    128,612.20/177,484.79 = 71,255.24/x
  3. Step 3: Cross multiply
    128,612.20x = 177,484.79 × 71,255.24
  4. Step 4: Simplify right side
    128,612.20x = 12,646,721,307.80
  5. Step 5: Solve for x
    x = 12,646,721,307.80/128,612.20
  6. Step 6: Final answer
    x = 98,332.21

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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.