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Finding the Fourth Proportional to 91,370.72, 136,723.80 and 75,427.49

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Solution

The fourth proportional to 91,370.72, 136,723.80 and 75,427.49 is: 112,866.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,370.72 : 136,723.80 = 75,427.49 : x
  2. Step 2: Convert to fraction form
    91,370.72/136,723.80 = 75,427.49/x
  3. Step 3: Cross multiply
    91,370.72x = 136,723.80 × 75,427.49
  4. Step 4: Simplify right side
    91,370.72x = 10,312,733,057.26
  5. Step 5: Solve for x
    x = 10,312,733,057.26/91,370.72
  6. Step 6: Final answer
    x = 112,866.93

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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.