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Finding the Fourth Proportional to 66,881.64, 99,732.96 and 66,282.06

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Solution

The fourth proportional to 66,881.64, 99,732.96 and 66,282.06 is: 98,838.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,881.64 : 99,732.96 = 66,282.06 : x
  2. Step 2: Convert to fraction form
    66,881.64/99,732.96 = 66,282.06/x
  3. Step 3: Cross multiply
    66,881.64x = 99,732.96 × 66,282.06
  4. Step 4: Simplify right side
    66,881.64x = 6,610,506,038.70
  5. Step 5: Solve for x
    x = 6,610,506,038.70/66,881.64
  6. Step 6: Final answer
    x = 98,838.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.