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Finding the Fourth Proportional to 72,201.08, 99,639.20 and 40,369.68

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Solution

The fourth proportional to 72,201.08, 99,639.20 and 40,369.68 is: 55,711.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,201.08 : 99,639.20 = 40,369.68 : x
  2. Step 2: Convert to fraction form
    72,201.08/99,639.20 = 40,369.68/x
  3. Step 3: Cross multiply
    72,201.08x = 99,639.20 × 40,369.68
  4. Step 4: Simplify right side
    72,201.08x = 4,022,402,619.46
  5. Step 5: Solve for x
    x = 4,022,402,619.46/72,201.08
  6. Step 6: Final answer
    x = 55,711.11

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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.