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Finding the Fourth Proportional to 90,577.84, 135,740.20 and 77,180.88

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Solution

The fourth proportional to 90,577.84, 135,740.20 and 77,180.88 is: 115,663.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,577.84 : 135,740.20 = 77,180.88 : x
  2. Step 2: Convert to fraction form
    90,577.84/135,740.20 = 77,180.88/x
  3. Step 3: Cross multiply
    90,577.84x = 135,740.20 × 77,180.88
  4. Step 4: Simplify right side
    90,577.84x = 10,476,548,087.38
  5. Step 5: Solve for x
    x = 10,476,548,087.38/90,577.84
  6. Step 6: Final answer
    x = 115,663.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.