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Finding the Fourth Proportional to 91,907.86, 126,823.89 and 51,612.46

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Solution

The fourth proportional to 91,907.86, 126,823.89 and 51,612.46 is: 71,220.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,907.86 : 126,823.89 = 51,612.46 : x
  2. Step 2: Convert to fraction form
    91,907.86/126,823.89 = 51,612.46/x
  3. Step 3: Cross multiply
    91,907.86x = 126,823.89 × 51,612.46
  4. Step 4: Simplify right side
    91,907.86x = 6,545,692,949.67
  5. Step 5: Solve for x
    x = 6,545,692,949.67/91,907.86
  6. Step 6: Final answer
    x = 71,220.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.