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Finding the Fourth Proportional to 72,979.47, 100,703.12 and 41,146.47

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Solution

The fourth proportional to 72,979.47, 100,703.12 and 41,146.47 is: 56,777.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979.47 : 100,703.12 = 41,146.47 : x
  2. Step 2: Convert to fraction form
    72,979.47/100,703.12 = 41,146.47/x
  3. Step 3: Cross multiply
    72,979.47x = 100,703.12 × 41,146.47
  4. Step 4: Simplify right side
    72,979.47x = 4,143,577,700.25
  5. Step 5: Solve for x
    x = 4,143,577,700.25/72,979.47
  6. Step 6: Final answer
    x = 56,777.31

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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.