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Finding the Fourth Proportional to 99,030.60, 148,200.30 and 90,736.20

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Solution

The fourth proportional to 99,030.60, 148,200.30 and 90,736.20 is: 135,787.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,030.60 : 148,200.30 = 90,736.20 : x
  2. Step 2: Convert to fraction form
    99,030.60/148,200.30 = 90,736.20/x
  3. Step 3: Cross multiply
    99,030.60x = 148,200.30 × 90,736.20
  4. Step 4: Simplify right side
    99,030.60x = 13,447,132,060.86
  5. Step 5: Solve for x
    x = 13,447,132,060.86/99,030.60
  6. Step 6: Final answer
    x = 135,787.65

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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.