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Finding the Fourth Proportional to 79,122.56, 109,154.40 and 47,275.52

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Solution

The fourth proportional to 79,122.56, 109,154.40 and 47,275.52 is: 65,219.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,122.56 : 109,154.40 = 47,275.52 : x
  2. Step 2: Convert to fraction form
    79,122.56/109,154.40 = 47,275.52/x
  3. Step 3: Cross multiply
    79,122.56x = 109,154.40 × 47,275.52
  4. Step 4: Simplify right side
    79,122.56x = 5,160,331,020.29
  5. Step 5: Solve for x
    x = 5,160,331,020.29/79,122.56
  6. Step 6: Final answer
    x = 65,219.46

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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.