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Finding the Fourth Proportional to 92,129.09, 138,106.15 and 36,005.20

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Solution

The fourth proportional to 92,129.09, 138,106.15 and 36,005.20 is: 53,973.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,129.09 : 138,106.15 = 36,005.20 : x
  2. Step 2: Convert to fraction form
    92,129.09/138,106.15 = 36,005.20/x
  3. Step 3: Cross multiply
    92,129.09x = 138,106.15 × 36,005.20
  4. Step 4: Simplify right side
    92,129.09x = 4,972,539,116.70
  5. Step 5: Solve for x
    x = 4,972,539,116.70/92,129.09
  6. Step 6: Final answer
    x = 53,973.61

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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.