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Finding the Fourth Proportional to 66,114.90, 99,152.10 and 21,731.40

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Solution

The fourth proportional to 66,114.90, 99,152.10 and 21,731.40 is: 32,590.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,114.90 : 99,152.10 = 21,731.40 : x
  2. Step 2: Convert to fraction form
    66,114.90/99,152.10 = 21,731.40/x
  3. Step 3: Cross multiply
    66,114.90x = 99,152.10 × 21,731.40
  4. Step 4: Simplify right side
    66,114.90x = 2,154,713,945.94
  5. Step 5: Solve for x
    x = 2,154,713,945.94/66,114.90
  6. Step 6: Final answer
    x = 32,590.44

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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.