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Finding the Fourth Proportional to 198,031.12, 297,059.68 and 57,778

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Solution

The fourth proportional to 198,031.12, 297,059.68 and 57,778 is: 86,670.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,031.12 : 297,059.68 = 57,778 : x
  2. Step 2: Convert to fraction form
    198,031.12/297,059.68 = 57,778/x
  3. Step 3: Cross multiply
    198,031.12x = 297,059.68 × 57,778
  4. Step 4: Simplify right side
    198,031.12x = 17,163,514,191.04
  5. Step 5: Solve for x
    x = 17,163,514,191.04/198,031.12
  6. Step 6: Final answer
    x = 86,670.79

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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.