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Finding the Fourth Proportional to 79,478.40, 109,634.58 and 49,618.56

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Solution

The fourth proportional to 79,478.40, 109,634.58 and 49,618.56 is: 68,445.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,478.40 : 109,634.58 = 49,618.56 : x
  2. Step 2: Convert to fraction form
    79,478.40/109,634.58 = 49,618.56/x
  3. Step 3: Cross multiply
    79,478.40x = 109,634.58 × 49,618.56
  4. Step 4: Simplify right side
    79,478.40x = 5,439,909,985.80
  5. Step 5: Solve for x
    x = 5,439,909,985.80/79,478.40
  6. Step 6: Final answer
    x = 68,445.14

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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.