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Finding the Fourth Proportional to 207,890.40, 311,842.80 and 65,737.20

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Solution

The fourth proportional to 207,890.40, 311,842.80 and 65,737.20 is: 98,608.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,890.40 : 311,842.80 = 65,737.20 : x
  2. Step 2: Convert to fraction form
    207,890.40/311,842.80 = 65,737.20/x
  3. Step 3: Cross multiply
    207,890.40x = 311,842.80 × 65,737.20
  4. Step 4: Simplify right side
    207,890.40x = 20,499,672,512.16
  5. Step 5: Solve for x
    x = 20,499,672,512.16/207,890.40
  6. Step 6: Final answer
    x = 98,608.08

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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.