Home / 83,721.60-125,582.40-31,120.20

Finding the Fourth Proportional to 83,721.60, 125,582.40 and 31,120.20

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Solution

The fourth proportional to 83,721.60, 125,582.40 and 31,120.20 is: 46,680.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,721.60 : 125,582.40 = 31,120.20 : x
  2. Step 2: Convert to fraction form
    83,721.60/125,582.40 = 31,120.20/x
  3. Step 3: Cross multiply
    83,721.60x = 125,582.40 × 31,120.20
  4. Step 4: Simplify right side
    83,721.60x = 3,908,149,404.48
  5. Step 5: Solve for x
    x = 3,908,149,404.48/83,721.60
  6. Step 6: Final answer
    x = 46,680.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.