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Finding the Fourth Proportional to 88,424.88, 121,756.08 and 66,652.78

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Solution

The fourth proportional to 88,424.88, 121,756.08 and 66,652.78 is: 91,777.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,424.88 : 121,756.08 = 66,652.78 : x
  2. Step 2: Convert to fraction form
    88,424.88/121,756.08 = 66,652.78/x
  3. Step 3: Cross multiply
    88,424.88x = 121,756.08 × 66,652.78
  4. Step 4: Simplify right side
    88,424.88x = 8,115,381,213.90
  5. Step 5: Solve for x
    x = 8,115,381,213.90/88,424.88
  6. Step 6: Final answer
    x = 91,777.12

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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.