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Finding the Fourth Proportional to 207,600.60, 311,384.70 and 81,216.30

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Solution

The fourth proportional to 207,600.60, 311,384.70 and 81,216.30 is: 121,818.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,600.60 : 311,384.70 = 81,216.30 : x
  2. Step 2: Convert to fraction form
    207,600.60/311,384.70 = 81,216.30/x
  3. Step 3: Cross multiply
    207,600.60x = 311,384.70 × 81,216.30
  4. Step 4: Simplify right side
    207,600.60x = 25,289,513,210.61
  5. Step 5: Solve for x
    x = 25,289,513,210.61/207,600.60
  6. Step 6: Final answer
    x = 121,818.11

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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.