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Finding the Fourth Proportional to 91,287.75, 125,976.24 and 51,008.45

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Solution

The fourth proportional to 91,287.75, 125,976.24 and 51,008.45 is: 70,391.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,287.75 : 125,976.24 = 51,008.45 : x
  2. Step 2: Convert to fraction form
    91,287.75/125,976.24 = 51,008.45/x
  3. Step 3: Cross multiply
    91,287.75x = 125,976.24 × 51,008.45
  4. Step 4: Simplify right side
    91,287.75x = 6,425,852,484.19
  5. Step 5: Solve for x
    x = 6,425,852,484.19/91,287.75
  6. Step 6: Final answer
    x = 70,391.18

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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.