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Finding the Fourth Proportional to 66,877.79, 99,727.25 and 66,278.21

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Solution

The fourth proportional to 66,877.79, 99,727.25 and 66,278.21 is: 98,833.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,877.79 : 99,727.25 = 66,278.21 : x
  2. Step 2: Convert to fraction form
    66,877.79/99,727.25 = 66,278.21/x
  3. Step 3: Cross multiply
    66,877.79x = 99,727.25 × 66,278.21
  4. Step 4: Simplify right side
    66,877.79x = 6,609,742,788.20
  5. Step 5: Solve for x
    x = 6,609,742,788.20/66,877.79
  6. Step 6: Final answer
    x = 98,833.16

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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.