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Finding the Fourth Proportional to 79,640.38, 109,901.10 and 47,790.46

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Solution

The fourth proportional to 79,640.38, 109,901.10 and 47,790.46 is: 65,949.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,640.38 : 109,901.10 = 47,790.46 : x
  2. Step 2: Convert to fraction form
    79,640.38/109,901.10 = 47,790.46/x
  3. Step 3: Cross multiply
    79,640.38x = 109,901.10 × 47,790.46
  4. Step 4: Simplify right side
    79,640.38x = 5,252,224,123.51
  5. Step 5: Solve for x
    x = 5,252,224,123.51/79,640.38
  6. Step 6: Final answer
    x = 65,949.26

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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.