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Finding the Fourth Proportional to 101,586.39, 140,142.69 and 65,787.93

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Solution

The fourth proportional to 101,586.39, 140,142.69 and 65,787.93 is: 90,757.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,586.39 : 140,142.69 = 65,787.93 : x
  2. Step 2: Convert to fraction form
    101,586.39/140,142.69 = 65,787.93/x
  3. Step 3: Cross multiply
    101,586.39x = 140,142.69 × 65,787.93
  4. Step 4: Simplify right side
    101,586.39x = 9,219,697,479.73
  5. Step 5: Solve for x
    x = 9,219,697,479.73/101,586.39
  6. Step 6: Final answer
    x = 90,757.21

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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.