Home / 109,530.18-151,145.34-61,780.68

Finding the Fourth Proportional to 109,530.18, 151,145.34 and 61,780.68

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Solution

The fourth proportional to 109,530.18, 151,145.34 and 61,780.68 is: 85,253.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,530.18 : 151,145.34 = 61,780.68 : x
  2. Step 2: Convert to fraction form
    109,530.18/151,145.34 = 61,780.68/x
  3. Step 3: Cross multiply
    109,530.18x = 151,145.34 × 61,780.68
  4. Step 4: Simplify right side
    109,530.18x = 9,337,861,884.03
  5. Step 5: Solve for x
    x = 9,337,861,884.03/109,530.18
  6. Step 6: Final answer
    x = 85,253.78

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1.5x scale

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.