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Finding the Fourth Proportional to 105,665.74, 145,833.66 and 65,392.48

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Solution

The fourth proportional to 105,665.74, 145,833.66 and 65,392.48 is: 90,250.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,665.74 : 145,833.66 = 65,392.48 : x
  2. Step 2: Convert to fraction form
    105,665.74/145,833.66 = 65,392.48/x
  3. Step 3: Cross multiply
    105,665.74x = 145,833.66 × 65,392.48
  4. Step 4: Simplify right side
    105,665.74x = 9,536,424,694.88
  5. Step 5: Solve for x
    x = 9,536,424,694.88/105,665.74
  6. Step 6: Final answer
    x = 90,250.87

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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.