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Finding the Fourth Proportional to 108,216.90, 162,325.35 and 81,972.90

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Solution

The fourth proportional to 108,216.90, 162,325.35 and 81,972.90 is: 122,959.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,216.90 : 162,325.35 = 81,972.90 : x
  2. Step 2: Convert to fraction form
    108,216.90/162,325.35 = 81,972.90/x
  3. Step 3: Cross multiply
    108,216.90x = 162,325.35 × 81,972.90
  4. Step 4: Simplify right side
    108,216.90x = 13,306,279,683.02
  5. Step 5: Solve for x
    x = 13,306,279,683.02/108,216.90
  6. Step 6: Final answer
    x = 122,959.35

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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.