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Finding the Fourth Proportional to 79,045.92, 109,123.20 and 61,100.40

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Solution

The fourth proportional to 79,045.92, 109,123.20 and 61,100.40 is: 84,349.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,045.92 : 109,123.20 = 61,100.40 : x
  2. Step 2: Convert to fraction form
    79,045.92/109,123.20 = 61,100.40/x
  3. Step 3: Cross multiply
    79,045.92x = 109,123.20 × 61,100.40
  4. Step 4: Simplify right side
    79,045.92x = 6,667,471,169.28
  5. Step 5: Solve for x
    x = 6,667,471,169.28/79,045.92
  6. Step 6: Final answer
    x = 84,349.34

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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.