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Finding the Fourth Proportional to 99,064.62, 148,830.21 and 80,713.26

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Solution

The fourth proportional to 99,064.62, 148,830.21 and 80,713.26 is: 121,259.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,064.62 : 148,830.21 = 80,713.26 : x
  2. Step 2: Convert to fraction form
    99,064.62/148,830.21 = 80,713.26/x
  3. Step 3: Cross multiply
    99,064.62x = 148,830.21 × 80,713.26
  4. Step 4: Simplify right side
    99,064.62x = 12,012,571,435.58
  5. Step 5: Solve for x
    x = 12,012,571,435.58/99,064.62
  6. Step 6: Final answer
    x = 121,259.96

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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.