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Finding the Fourth Proportional to 107,932.40, 161,898.60 and 78,556.40

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Solution

The fourth proportional to 107,932.40, 161,898.60 and 78,556.40 is: 117,834.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,932.40 : 161,898.60 = 78,556.40 : x
  2. Step 2: Convert to fraction form
    107,932.40/161,898.60 = 78,556.40/x
  3. Step 3: Cross multiply
    107,932.40x = 161,898.60 × 78,556.40
  4. Step 4: Simplify right side
    107,932.40x = 12,718,171,181.04
  5. Step 5: Solve for x
    x = 12,718,171,181.04/107,932.40
  6. Step 6: Final answer
    x = 117,834.60

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1.5x scale

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.