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Finding the Fourth Proportional to 115,909.92, 160,030.08 and 79,671.60

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Solution

The fourth proportional to 115,909.92, 160,030.08 and 79,671.60 is: 109,997.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,909.92 : 160,030.08 = 79,671.60 : x
  2. Step 2: Convert to fraction form
    115,909.92/160,030.08 = 79,671.60/x
  3. Step 3: Cross multiply
    115,909.92x = 160,030.08 × 79,671.60
  4. Step 4: Simplify right side
    115,909.92x = 12,749,852,521.73
  5. Step 5: Solve for x
    x = 12,749,852,521.73/115,909.92
  6. Step 6: Final answer
    x = 109,997.94

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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.