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Finding the Fourth Proportional to 91,048.34, 125,711.45 and 75,979.91

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Solution

The fourth proportional to 91,048.34, 125,711.45 and 75,979.91 is: 104,906.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,048.34 : 125,711.45 = 75,979.91 : x
  2. Step 2: Convert to fraction form
    91,048.34/125,711.45 = 75,979.91/x
  3. Step 3: Cross multiply
    91,048.34x = 125,711.45 × 75,979.91
  4. Step 4: Simplify right side
    91,048.34x = 9,551,543,648.51
  5. Step 5: Solve for x
    x = 9,551,543,648.51/91,048.34
  6. Step 6: Final answer
    x = 104,906.30

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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.