Home / 114,931.72-158,515.78-78,654.64

Finding the Fourth Proportional to 114,931.72, 158,515.78 and 78,654.64

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Solution

The fourth proportional to 114,931.72, 158,515.78 and 78,654.64 is: 108,481.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,931.72 : 158,515.78 = 78,654.64 : x
  2. Step 2: Convert to fraction form
    114,931.72/158,515.78 = 78,654.64/x
  3. Step 3: Cross multiply
    114,931.72x = 158,515.78 × 78,654.64
  4. Step 4: Simplify right side
    114,931.72x = 12,468,001,610.22
  5. Step 5: Solve for x
    x = 12,468,001,610.22/114,931.72
  6. Step 6: Final answer
    x = 108,481.82

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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.