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Finding the Fourth Proportional to 66,167.64, 91,302.66 and 40,687.20

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Solution

The fourth proportional to 66,167.64, 91,302.66 and 40,687.20 is: 56,143.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,167.64 : 91,302.66 = 40,687.20 : x
  2. Step 2: Convert to fraction form
    66,167.64/91,302.66 = 40,687.20/x
  3. Step 3: Cross multiply
    66,167.64x = 91,302.66 × 40,687.20
  4. Step 4: Simplify right side
    66,167.64x = 3,714,849,587.95
  5. Step 5: Solve for x
    x = 3,714,849,587.95/66,167.64
  6. Step 6: Final answer
    x = 56,143.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.