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Finding the Fourth Proportional to 79,707.48, 109,996.64 and 47,876.92

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Solution

The fourth proportional to 79,707.48, 109,996.64 and 47,876.92 is: 66,070.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,707.48 : 109,996.64 = 47,876.92 : x
  2. Step 2: Convert to fraction form
    79,707.48/109,996.64 = 47,876.92/x
  3. Step 3: Cross multiply
    79,707.48x = 109,996.64 × 47,876.92
  4. Step 4: Simplify right side
    79,707.48x = 5,266,300,333.55
  5. Step 5: Solve for x
    x = 5,266,300,333.55/79,707.48
  6. Step 6: Final answer
    x = 66,070.34

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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.