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Finding the Fourth Proportional to 72,332.78, 99,822.93 and 40,499.78

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Solution

The fourth proportional to 72,332.78, 99,822.93 and 40,499.78 is: 55,891.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,332.78 : 99,822.93 = 40,499.78 : x
  2. Step 2: Convert to fraction form
    72,332.78/99,822.93 = 40,499.78/x
  3. Step 3: Cross multiply
    72,332.78x = 99,822.93 × 40,499.78
  4. Step 4: Simplify right side
    72,332.78x = 4,042,806,703.96
  5. Step 5: Solve for x
    x = 4,042,806,703.96/72,332.78
  6. Step 6: Final answer
    x = 55,891.76

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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.