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Finding the Fourth Proportional to 223,913.90, 308,987.17 and 123,311.90

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Solution

The fourth proportional to 223,913.90, 308,987.17 and 123,311.90 is: 170,162.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,913.90 : 308,987.17 = 123,311.90 : x
  2. Step 2: Convert to fraction form
    223,913.90/308,987.17 = 123,311.90/x
  3. Step 3: Cross multiply
    223,913.90x = 308,987.17 × 123,311.90
  4. Step 4: Simplify right side
    223,913.90x = 38,101,793,155.11
  5. Step 5: Solve for x
    x = 38,101,793,155.11/223,913.90
  6. Step 6: Final answer
    x = 170,162.70

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1.5x scale

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.