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Finding the Fourth Proportional to 91,619.61, 138,053.55 and 75,344.22

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Solution

The fourth proportional to 91,619.61, 138,053.55 and 75,344.22 is: 113,529.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,619.61 : 138,053.55 = 75,344.22 : x
  2. Step 2: Convert to fraction form
    91,619.61/138,053.55 = 75,344.22/x
  3. Step 3: Cross multiply
    91,619.61x = 138,053.55 × 75,344.22
  4. Step 4: Simplify right side
    91,619.61x = 10,401,537,042.98
  5. Step 5: Solve for x
    x = 10,401,537,042.98/91,619.61
  6. Step 6: Final answer
    x = 113,529.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.