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Finding the Fourth Proportional to 172,711, 238,421.24 and 121,765.24

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Solution

The fourth proportional to 172,711, 238,421.24 and 121,765.24 is: 168,092.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,711 : 238,421.24 = 121,765.24 : x
  2. Step 2: Convert to fraction form
    172,711/238,421.24 = 121,765.24/x
  3. Step 3: Cross multiply
    172,711x = 238,421.24 × 121,765.24
  4. Step 4: Simplify right side
    172,711x = 29,031,419,509.70
  5. Step 5: Solve for x
    x = 29,031,419,509.70/172,711
  6. Step 6: Final answer
    x = 168,092.48

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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.