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Finding the Fourth Proportional to 86,031.69, 118,719.87 and 47,793.90

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Solution

The fourth proportional to 86,031.69, 118,719.87 and 47,793.90 is: 65,953.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,031.69 : 118,719.87 = 47,793.90 : x
  2. Step 2: Convert to fraction form
    86,031.69/118,719.87 = 47,793.90/x
  3. Step 3: Cross multiply
    86,031.69x = 118,719.87 × 47,793.90
  4. Step 4: Simplify right side
    86,031.69x = 5,674,085,594.79
  5. Step 5: Solve for x
    x = 5,674,085,594.79/86,031.69
  6. Step 6: Final answer
    x = 65,953.44

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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.