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Finding the Fourth Proportional to 98,560.40, 147,862.20 and 39,381.20

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Solution

The fourth proportional to 98,560.40, 147,862.20 and 39,381.20 is: 59,080.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,560.40 : 147,862.20 = 39,381.20 : x
  2. Step 2: Convert to fraction form
    98,560.40/147,862.20 = 39,381.20/x
  3. Step 3: Cross multiply
    98,560.40x = 147,862.20 × 39,381.20
  4. Step 4: Simplify right side
    98,560.40x = 5,822,990,870.64
  5. Step 5: Solve for x
    x = 5,822,990,870.64/98,560.40
  6. Step 6: Final answer
    x = 59,080.43

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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.