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Finding the Fourth Proportional to 66,461.64, 91,669.74 and 64,264.92

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Solution

The fourth proportional to 66,461.64, 91,669.74 and 64,264.92 is: 88,639.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.64 : 91,669.74 = 64,264.92 : x
  2. Step 2: Convert to fraction form
    66,461.64/91,669.74 = 64,264.92/x
  3. Step 3: Cross multiply
    66,461.64x = 91,669.74 × 64,264.92
  4. Step 4: Simplify right side
    66,461.64x = 5,891,148,507.52
  5. Step 5: Solve for x
    x = 5,891,148,507.52/66,461.64
  6. Step 6: Final answer
    x = 88,639.83

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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.