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Finding the Fourth Proportional to 66,490.61, 91,765.10 and 48,576.65

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Solution

The fourth proportional to 66,490.61, 91,765.10 and 48,576.65 is: 67,041.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,490.61 : 91,765.10 = 48,576.65 : x
  2. Step 2: Convert to fraction form
    66,490.61/91,765.10 = 48,576.65/x
  3. Step 3: Cross multiply
    66,490.61x = 91,765.10 × 48,576.65
  4. Step 4: Simplify right side
    66,490.61x = 4,457,640,807.53
  5. Step 5: Solve for x
    x = 4,457,640,807.53/66,490.61
  6. Step 6: Final answer
    x = 67,041.66

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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.