Home / 103,680,320.80-155,520,481.20-76,806,464.80

Finding the Fourth Proportional to 103,680,320.80, 155,520,481.20 and 76,806,464.80

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Solution

The fourth proportional to 103,680,320.80, 155,520,481.20 and 76,806,464.80 is: 115,209,697.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,680,320.80 : 155,520,481.20 = 76,806,464.80 : x
  2. Step 2: Convert to fraction form
    103,680,320.80/155,520,481.20 = 76,806,464.80/x
  3. Step 3: Cross multiply
    103,680,320.80x = 155,520,481.20 × 76,806,464.80
  4. Step 4: Simplify right side
    103,680,320.80x = 11,944,978,364,966,860
  5. Step 5: Solve for x
    x = 11,944,978,364,966,860/103,680,320.80
  6. Step 6: Final answer
    x = 115,209,697.20

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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.