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Finding the Fourth Proportional to 98,630.80, 147,946.20 and 81,350.80

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Solution

The fourth proportional to 98,630.80, 147,946.20 and 81,350.80 is: 122,026.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,630.80 : 147,946.20 = 81,350.80 : x
  2. Step 2: Convert to fraction form
    98,630.80/147,946.20 = 81,350.80/x
  3. Step 3: Cross multiply
    98,630.80x = 147,946.20 × 81,350.80
  4. Step 4: Simplify right side
    98,630.80x = 12,035,541,726.96
  5. Step 5: Solve for x
    x = 12,035,541,726.96/98,630.80
  6. Step 6: Final answer
    x = 122,026.20

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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.