Home / 99,103.32-136,729.08-56,631.78

Finding the Fourth Proportional to 99,103.32, 136,729.08 and 56,631.78

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Solution

The fourth proportional to 99,103.32, 136,729.08 and 56,631.78 is: 78,132.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,103.32 : 136,729.08 = 56,631.78 : x
  2. Step 2: Convert to fraction form
    99,103.32/136,729.08 = 56,631.78/x
  3. Step 3: Cross multiply
    99,103.32x = 136,729.08 × 56,631.78
  4. Step 4: Simplify right side
    99,103.32x = 7,743,211,178.16
  5. Step 5: Solve for x
    x = 7,743,211,178.16/99,103.32
  6. Step 6: Final answer
    x = 78,132.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.