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Finding the Fourth Proportional to 98,471.80, 147,534.90 and 80,846.20

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Solution

The fourth proportional to 98,471.80, 147,534.90 and 80,846.20 is: 121,127.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,471.80 : 147,534.90 = 80,846.20 : x
  2. Step 2: Convert to fraction form
    98,471.80/147,534.90 = 80,846.20/x
  3. Step 3: Cross multiply
    98,471.80x = 147,534.90 × 80,846.20
  4. Step 4: Simplify right side
    98,471.80x = 11,927,636,032.38
  5. Step 5: Solve for x
    x = 11,927,636,032.38/98,471.80
  6. Step 6: Final answer
    x = 121,127.43

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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.