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Finding the Fourth Proportional to 72,799.16, 100,454.70 and 40,979

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Solution

The fourth proportional to 72,799.16, 100,454.70 and 40,979 is: 56,546.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,799.16 : 100,454.70 = 40,979 : x
  2. Step 2: Convert to fraction form
    72,799.16/100,454.70 = 40,979/x
  3. Step 3: Cross multiply
    72,799.16x = 100,454.70 × 40,979
  4. Step 4: Simplify right side
    72,799.16x = 4,116,533,151.30
  5. Step 5: Solve for x
    x = 4,116,533,151.30/72,799.16
  6. Step 6: Final answer
    x = 56,546.44

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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.