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Finding the Fourth Proportional to 66,491.01, 91,728.65 and 43,800.89

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Solution

The fourth proportional to 66,491.01, 91,728.65 and 43,800.89 is: 60,426.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.01 : 91,728.65 = 43,800.89 : x
  2. Step 2: Convert to fraction form
    66,491.01/91,728.65 = 43,800.89/x
  3. Step 3: Cross multiply
    66,491.01x = 91,728.65 × 43,800.89
  4. Step 4: Simplify right side
    66,491.01x = 4,017,796,159.36
  5. Step 5: Solve for x
    x = 4,017,796,159.36/66,491.01
  6. Step 6: Final answer
    x = 60,426.16

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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.