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Finding the Fourth Proportional to 105,706.44, 145,902.33 and 65,396.79

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Solution

The fourth proportional to 105,706.44, 145,902.33 and 65,396.79 is: 90,264.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,706.44 : 145,902.33 = 65,396.79 : x
  2. Step 2: Convert to fraction form
    105,706.44/145,902.33 = 65,396.79/x
  3. Step 3: Cross multiply
    105,706.44x = 145,902.33 × 65,396.79
  4. Step 4: Simplify right side
    105,706.44x = 9,541,544,035.52
  5. Step 5: Solve for x
    x = 9,541,544,035.52/105,706.44
  6. Step 6: Final answer
    x = 90,264.55

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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.