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Finding the Fourth Proportional to 320,057.20, 480,085.80 and 109,697.20

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Solution

The fourth proportional to 320,057.20, 480,085.80 and 109,697.20 is: 164,545.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,057.20 : 480,085.80 = 109,697.20 : x
  2. Step 2: Convert to fraction form
    320,057.20/480,085.80 = 109,697.20/x
  3. Step 3: Cross multiply
    320,057.20x = 480,085.80 × 109,697.20
  4. Step 4: Simplify right side
    320,057.20x = 52,664,068,019.76
  5. Step 5: Solve for x
    x = 52,664,068,019.76/320,057.20
  6. Step 6: Final answer
    x = 164,545.80

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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.