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Finding the Fourth Proportional to 107,865.20, 161,797.80 and 70,540.40

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Solution

The fourth proportional to 107,865.20, 161,797.80 and 70,540.40 is: 105,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,865.20 : 161,797.80 = 70,540.40 : x
  2. Step 2: Convert to fraction form
    107,865.20/161,797.80 = 70,540.40/x
  3. Step 3: Cross multiply
    107,865.20x = 161,797.80 × 70,540.40
  4. Step 4: Simplify right side
    107,865.20x = 11,413,281,531.12
  5. Step 5: Solve for x
    x = 11,413,281,531.12/107,865.20
  6. Step 6: Final answer
    x = 105,810.60

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1.5x scale

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.