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Finding the Fourth Proportional to 99,054.40, 148,909.65 and 84,620.20

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Solution

The fourth proportional to 99,054.40, 148,909.65 and 84,620.20 is: 127,210.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,054.40 : 148,909.65 = 84,620.20 : x
  2. Step 2: Convert to fraction form
    99,054.40/148,909.65 = 84,620.20/x
  3. Step 3: Cross multiply
    99,054.40x = 148,909.65 × 84,620.20
  4. Step 4: Simplify right side
    99,054.40x = 12,600,764,364.93
  5. Step 5: Solve for x
    x = 12,600,764,364.93/99,054.40
  6. Step 6: Final answer
    x = 127,210.55

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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.