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Finding the Fourth Proportional to 108,079.20, 162,021.60 and 70,657.20

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Solution

The fourth proportional to 108,079.20, 162,021.60 and 70,657.20 is: 105,922.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,079.20 : 162,021.60 = 70,657.20 : x
  2. Step 2: Convert to fraction form
    108,079.20/162,021.60 = 70,657.20/x
  3. Step 3: Cross multiply
    108,079.20x = 162,021.60 × 70,657.20
  4. Step 4: Simplify right side
    108,079.20x = 11,447,992,595.52
  5. Step 5: Solve for x
    x = 11,447,992,595.52/108,079.20
  6. Step 6: Final answer
    x = 105,922.26

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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.