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Finding the Fourth Proportional to 66,648.80, 99,935.40 and 27,159.68

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Solution

The fourth proportional to 66,648.80, 99,935.40 and 27,159.68 is: 40,724.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,648.80 : 99,935.40 = 27,159.68 : x
  2. Step 2: Convert to fraction form
    66,648.80/99,935.40 = 27,159.68/x
  3. Step 3: Cross multiply
    66,648.80x = 99,935.40 × 27,159.68
  4. Step 4: Simplify right side
    66,648.80x = 2,714,213,484.67
  5. Step 5: Solve for x
    x = 2,714,213,484.67/66,648.80
  6. Step 6: Final answer
    x = 40,724.12

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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.