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Finding the Fourth Proportional to 207,989.72, 312,010.54 and 67,710.68

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Solution

The fourth proportional to 207,989.72, 312,010.54 and 67,710.68 is: 101,574.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,989.72 : 312,010.54 = 67,710.68 : x
  2. Step 2: Convert to fraction form
    207,989.72/312,010.54 = 67,710.68/x
  3. Step 3: Cross multiply
    207,989.72x = 312,010.54 × 67,710.68
  4. Step 4: Simplify right side
    207,989.72x = 21,126,445,830.57
  5. Step 5: Solve for x
    x = 21,126,445,830.57/207,989.72
  6. Step 6: Final answer
    x = 101,574.47

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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.