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Finding the Fourth Proportional to 147,488.96, 203,486.61 and 87,039.20

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Solution

The fourth proportional to 147,488.96, 203,486.61 and 87,039.20 is: 120,085.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,488.96 : 203,486.61 = 87,039.20 : x
  2. Step 2: Convert to fraction form
    147,488.96/203,486.61 = 87,039.20/x
  3. Step 3: Cross multiply
    147,488.96x = 203,486.61 × 87,039.20
  4. Step 4: Simplify right side
    147,488.96x = 17,711,311,745.11
  5. Step 5: Solve for x
    x = 17,711,311,745.11/147,488.96
  6. Step 6: Final answer
    x = 120,085.68

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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.