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Finding the Fourth Proportional to 108,717.20, 162,922.20 and 80,416.40

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Solution

The fourth proportional to 108,717.20, 162,922.20 and 80,416.40 is: 120,510.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,717.20 : 162,922.20 = 80,416.40 : x
  2. Step 2: Convert to fraction form
    108,717.20/162,922.20 = 80,416.40/x
  3. Step 3: Cross multiply
    108,717.20x = 162,922.20 × 80,416.40
  4. Step 4: Simplify right side
    108,717.20x = 13,101,616,804.08
  5. Step 5: Solve for x
    x = 13,101,616,804.08/108,717.20
  6. Step 6: Final answer
    x = 120,510.98

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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.