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Finding the Fourth Proportional to 84,981.72, 127,498.50 and 61,342.68

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Solution

The fourth proportional to 84,981.72, 127,498.50 and 61,342.68 is: 92,032.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,981.72 : 127,498.50 = 61,342.68 : x
  2. Step 2: Convert to fraction form
    84,981.72/127,498.50 = 61,342.68/x
  3. Step 3: Cross multiply
    84,981.72x = 127,498.50 × 61,342.68
  4. Step 4: Simplify right side
    84,981.72x = 7,821,099,685.98
  5. Step 5: Solve for x
    x = 7,821,099,685.98/84,981.72
  6. Step 6: Final answer
    x = 92,032.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.