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Finding the Fourth Proportional to 72,844.18, 100,532.64 and 42,639.28

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Solution

The fourth proportional to 72,844.18, 100,532.64 and 42,639.28 is: 58,846.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,844.18 : 100,532.64 = 42,639.28 : x
  2. Step 2: Convert to fraction form
    72,844.18/100,532.64 = 42,639.28/x
  3. Step 3: Cross multiply
    72,844.18x = 100,532.64 × 42,639.28
  4. Step 4: Simplify right side
    72,844.18x = 4,286,639,294.66
  5. Step 5: Solve for x
    x = 4,286,639,294.66/72,844.18
  6. Step 6: Final answer
    x = 58,846.70

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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.