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Finding the Fourth Proportional to 107,860.20, 161,790.30 and 65,869.80

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Solution

The fourth proportional to 107,860.20, 161,790.30 and 65,869.80 is: 98,804.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,860.20 : 161,790.30 = 65,869.80 : x
  2. Step 2: Convert to fraction form
    107,860.20/161,790.30 = 65,869.80/x
  3. Step 3: Cross multiply
    107,860.20x = 161,790.30 × 65,869.80
  4. Step 4: Simplify right side
    107,860.20x = 10,657,094,702.94
  5. Step 5: Solve for x
    x = 10,657,094,702.94/107,860.20
  6. Step 6: Final answer
    x = 98,804.70

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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.