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Finding the Fourth Proportional to 207,430.32, 311,130.40 and 81,046.88

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Solution

The fourth proportional to 207,430.32, 311,130.40 and 81,046.88 is: 121,564.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,430.32 : 311,130.40 = 81,046.88 : x
  2. Step 2: Convert to fraction form
    207,430.32/311,130.40 = 81,046.88/x
  3. Step 3: Cross multiply
    207,430.32x = 311,130.40 × 81,046.88
  4. Step 4: Simplify right side
    207,430.32x = 25,216,148,193.15
  5. Step 5: Solve for x
    x = 25,216,148,193.15/207,430.32
  6. Step 6: Final answer
    x = 121,564.43

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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.