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Finding the Fourth Proportional to 86,988.88, 120,102.23 and 66,809.55

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Solution

The fourth proportional to 86,988.88, 120,102.23 and 66,809.55 is: 92,241.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,988.88 : 120,102.23 = 66,809.55 : x
  2. Step 2: Convert to fraction form
    86,988.88/120,102.23 = 66,809.55/x
  3. Step 3: Cross multiply
    86,988.88x = 120,102.23 × 66,809.55
  4. Step 4: Simplify right side
    86,988.88x = 8,023,976,557.70
  5. Step 5: Solve for x
    x = 8,023,976,557.70/86,988.88
  6. Step 6: Final answer
    x = 92,241.40

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1.5x scale

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.