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Finding the Fourth Proportional to 72,424.55, 99,944.09 and 40,159.30

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Solution

The fourth proportional to 72,424.55, 99,944.09 and 40,159.30 is: 55,418.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,424.55 : 99,944.09 = 40,159.30 : x
  2. Step 2: Convert to fraction form
    72,424.55/99,944.09 = 40,159.30/x
  3. Step 3: Cross multiply
    72,424.55x = 99,944.09 × 40,159.30
  4. Step 4: Simplify right side
    72,424.55x = 4,013,684,693.54
  5. Step 5: Solve for x
    x = 4,013,684,693.54/72,424.55
  6. Step 6: Final answer
    x = 55,418.84

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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.