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Finding the Fourth Proportional to 72,644.14, 100,248.83 and 40,377.74

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Solution

The fourth proportional to 72,644.14, 100,248.83 and 40,377.74 is: 55,721.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,644.14 : 100,248.83 = 40,377.74 : x
  2. Step 2: Convert to fraction form
    72,644.14/100,248.83 = 40,377.74/x
  3. Step 3: Cross multiply
    72,644.14x = 100,248.83 × 40,377.74
  4. Step 4: Simplify right side
    72,644.14x = 4,047,821,193.04
  5. Step 5: Solve for x
    x = 4,047,821,193.04/72,644.14
  6. Step 6: Final answer
    x = 55,721.23

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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.