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Finding the Fourth Proportional to 80,630.76, 121,001.76 and 28,040.16

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Solution

The fourth proportional to 80,630.76, 121,001.76 and 28,040.16 is: 42,079.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,630.76 : 121,001.76 = 28,040.16 : x
  2. Step 2: Convert to fraction form
    80,630.76/121,001.76 = 28,040.16/x
  3. Step 3: Cross multiply
    80,630.76x = 121,001.76 × 28,040.16
  4. Step 4: Simplify right side
    80,630.76x = 3,392,908,710.68
  5. Step 5: Solve for x
    x = 3,392,908,710.68/80,630.76
  6. Step 6: Final answer
    x = 42,079.58

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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.