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Finding the Fourth Proportional to 72,267.68, 99,731.52 and 40,435.84

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Solution

The fourth proportional to 72,267.68, 99,731.52 and 40,435.84 is: 55,802.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,267.68 : 99,731.52 = 40,435.84 : x
  2. Step 2: Convert to fraction form
    72,267.68/99,731.52 = 40,435.84/x
  3. Step 3: Cross multiply
    72,267.68x = 99,731.52 × 40,435.84
  4. Step 4: Simplify right side
    72,267.68x = 4,032,727,785.68
  5. Step 5: Solve for x
    x = 4,032,727,785.68/72,267.68
  6. Step 6: Final answer
    x = 55,802.65

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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.