Home / 90,691.40-135,972.30-40,730.60

Finding the Fourth Proportional to 90,691.40, 135,972.30 and 40,730.60

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Solution

The fourth proportional to 90,691.40, 135,972.30 and 40,730.60 is: 61,066.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,691.40 : 135,972.30 = 40,730.60 : x
  2. Step 2: Convert to fraction form
    90,691.40/135,972.30 = 40,730.60/x
  3. Step 3: Cross multiply
    90,691.40x = 135,972.30 × 40,730.60
  4. Step 4: Simplify right side
    90,691.40x = 5,538,233,362.38
  5. Step 5: Solve for x
    x = 5,538,233,362.38/90,691.40
  6. Step 6: Final answer
    x = 61,066.80

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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.