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Finding the Fourth Proportional to 118,031.20, 176,614.80 and 86,927.20

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Solution

The fourth proportional to 118,031.20, 176,614.80 and 86,927.20 is: 130,072.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,031.20 : 176,614.80 = 86,927.20 : x
  2. Step 2: Convert to fraction form
    118,031.20/176,614.80 = 86,927.20/x
  3. Step 3: Cross multiply
    118,031.20x = 176,614.80 × 86,927.20
  4. Step 4: Simplify right side
    118,031.20x = 15,352,630,042.56
  5. Step 5: Solve for x
    x = 15,352,630,042.56/118,031.20
  6. Step 6: Final answer
    x = 130,072.64

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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.