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Finding the Fourth Proportional to 107,320.61, 160,980.75 and 40,760.61

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Solution

The fourth proportional to 107,320.61, 160,980.75 and 40,760.61 is: 61,140.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,320.61 : 160,980.75 = 40,760.61 : x
  2. Step 2: Convert to fraction form
    107,320.61/160,980.75 = 40,760.61/x
  3. Step 3: Cross multiply
    107,320.61x = 160,980.75 × 40,760.61
  4. Step 4: Simplify right side
    107,320.61x = 6,561,673,568.26
  5. Step 5: Solve for x
    x = 6,561,673,568.26/107,320.61
  6. Step 6: Final answer
    x = 61,140.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.