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Finding the Fourth Proportional to 66,589.76, 91,859.20 and 45,080.16

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Solution

The fourth proportional to 66,589.76, 91,859.20 and 45,080.16 is: 62,187.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,589.76 : 91,859.20 = 45,080.16 : x
  2. Step 2: Convert to fraction form
    66,589.76/91,859.20 = 45,080.16/x
  3. Step 3: Cross multiply
    66,589.76x = 91,859.20 × 45,080.16
  4. Step 4: Simplify right side
    66,589.76x = 4,141,027,433.47
  5. Step 5: Solve for x
    x = 4,141,027,433.47/66,589.76
  6. Step 6: Final answer
    x = 62,187.15

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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.