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Finding the Fourth Proportional to 90,907.60, 136,233.40 and 72,219.60

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Solution

The fourth proportional to 90,907.60, 136,233.40 and 72,219.60 is: 108,227.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,907.60 : 136,233.40 = 72,219.60 : x
  2. Step 2: Convert to fraction form
    90,907.60/136,233.40 = 72,219.60/x
  3. Step 3: Cross multiply
    90,907.60x = 136,233.40 × 72,219.60
  4. Step 4: Simplify right side
    90,907.60x = 9,838,721,654.64
  5. Step 5: Solve for x
    x = 9,838,721,654.64/90,907.60
  6. Step 6: Final answer
    x = 108,227.71

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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.