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Finding the Fourth Proportional to 90,272.84, 124,522.26 and 66,461

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Solution

The fourth proportional to 90,272.84, 124,522.26 and 66,461 is: 91,676.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,272.84 : 124,522.26 = 66,461 : x
  2. Step 2: Convert to fraction form
    90,272.84/124,522.26 = 66,461/x
  3. Step 3: Cross multiply
    90,272.84x = 124,522.26 × 66,461
  4. Step 4: Simplify right side
    90,272.84x = 8,275,873,921.86
  5. Step 5: Solve for x
    x = 8,275,873,921.86/90,272.84
  6. Step 6: Final answer
    x = 91,676.23

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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.