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Finding the Fourth Proportional to 138,805.81, 191,552.63 and 75,143.60

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Solution

The fourth proportional to 138,805.81, 191,552.63 and 75,143.60 is: 103,698.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,805.81 : 191,552.63 = 75,143.60 : x
  2. Step 2: Convert to fraction form
    138,805.81/191,552.63 = 75,143.60/x
  3. Step 3: Cross multiply
    138,805.81x = 191,552.63 × 75,143.60
  4. Step 4: Simplify right side
    138,805.81x = 14,393,954,207.67
  5. Step 5: Solve for x
    x = 14,393,954,207.67/138,805.81
  6. Step 6: Final answer
    x = 103,698.50

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1.5x scale

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.