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Finding the Fourth Proportional to 66,061.96, 99,101.76 and 19,314.16

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Solution

The fourth proportional to 66,061.96, 99,101.76 and 19,314.16 is: 28,973.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,061.96 : 99,101.76 = 19,314.16 : x
  2. Step 2: Convert to fraction form
    66,061.96/99,101.76 = 19,314.16/x
  3. Step 3: Cross multiply
    66,061.96x = 99,101.76 × 19,314.16
  4. Step 4: Simplify right side
    66,061.96x = 1,914,067,248.92
  5. Step 5: Solve for x
    x = 1,914,067,248.92/66,061.96
  6. Step 6: Final answer
    x = 28,973.82

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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.