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Finding the Fourth Proportional to 66,417.03, 99,621.90 and 26,978.13

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Solution

The fourth proportional to 66,417.03, 99,621.90 and 26,978.13 is: 40,465.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,417.03 : 99,621.90 = 26,978.13 : x
  2. Step 2: Convert to fraction form
    66,417.03/99,621.90 = 26,978.13/x
  3. Step 3: Cross multiply
    66,417.03x = 99,621.90 × 26,978.13
  4. Step 4: Simplify right side
    66,417.03x = 2,687,612,569.05
  5. Step 5: Solve for x
    x = 2,687,612,569.05/66,417.03
  6. Step 6: Final answer
    x = 40,465.71

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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.