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Finding the Fourth Proportional to 72,282, 99,639.81 and 62,156.19

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Solution

The fourth proportional to 72,282, 99,639.81 and 62,156.19 is: 85,681.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,282 : 99,639.81 = 62,156.19 : x
  2. Step 2: Convert to fraction form
    72,282/99,639.81 = 62,156.19/x
  3. Step 3: Cross multiply
    72,282x = 99,639.81 × 62,156.19
  4. Step 4: Simplify right side
    72,282x = 6,193,230,961.92
  5. Step 5: Solve for x
    x = 6,193,230,961.92/72,282
  6. Step 6: Final answer
    x = 85,681.51

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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.