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Finding the Fourth Proportional to 98,471.04, 147,554.88 and 66,840

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Solution

The fourth proportional to 98,471.04, 147,554.88 and 66,840 is: 100,157.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,471.04 : 147,554.88 = 66,840 : x
  2. Step 2: Convert to fraction form
    98,471.04/147,554.88 = 66,840/x
  3. Step 3: Cross multiply
    98,471.04x = 147,554.88 × 66,840
  4. Step 4: Simplify right side
    98,471.04x = 9,862,568,179.20
  5. Step 5: Solve for x
    x = 9,862,568,179.20/98,471.04
  6. Step 6: Final answer
    x = 100,157.04

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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.