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Finding the Fourth Proportional to 79,260, 109,378.80 and 45,726

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Solution

The fourth proportional to 79,260, 109,378.80 and 45,726 is: 63,101.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,260 : 109,378.80 = 45,726 : x
  2. Step 2: Convert to fraction form
    79,260/109,378.80 = 45,726/x
  3. Step 3: Cross multiply
    79,260x = 109,378.80 × 45,726
  4. Step 4: Simplify right side
    79,260x = 5,001,455,008.80
  5. Step 5: Solve for x
    x = 5,001,455,008.80/79,260
  6. Step 6: Final answer
    x = 63,101.88

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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.