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Finding the Fourth Proportional to 111,207.50, 166,392.72 and 77,992.40

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Solution

The fourth proportional to 111,207.50, 166,392.72 and 77,992.40 is: 116,695.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,207.50 : 166,392.72 = 77,992.40 : x
  2. Step 2: Convert to fraction form
    111,207.50/166,392.72 = 77,992.40/x
  3. Step 3: Cross multiply
    111,207.50x = 166,392.72 × 77,992.40
  4. Step 4: Simplify right side
    111,207.50x = 12,977,367,575.33
  5. Step 5: Solve for x
    x = 12,977,367,575.33/111,207.50
  6. Step 6: Final answer
    x = 116,695.08

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1.5x scale

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.