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Finding the Fourth Proportional to 78,340.99, 108,031.17 and 67,047.97

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Solution

The fourth proportional to 78,340.99, 108,031.17 and 67,047.97 is: 92,458.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,340.99 : 108,031.17 = 67,047.97 : x
  2. Step 2: Convert to fraction form
    78,340.99/108,031.17 = 67,047.97/x
  3. Step 3: Cross multiply
    78,340.99x = 108,031.17 × 67,047.97
  4. Step 4: Simplify right side
    78,340.99x = 7,243,270,645.22
  5. Step 5: Solve for x
    x = 7,243,270,645.22/78,340.99
  6. Step 6: Final answer
    x = 92,458.25

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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.