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Finding the Fourth Proportional to 108,687.70, 163,031.55 and 49,638.70

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Solution

The fourth proportional to 108,687.70, 163,031.55 and 49,638.70 is: 74,458.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,687.70 : 163,031.55 = 49,638.70 : x
  2. Step 2: Convert to fraction form
    108,687.70/163,031.55 = 49,638.70/x
  3. Step 3: Cross multiply
    108,687.70x = 163,031.55 × 49,638.70
  4. Step 4: Simplify right side
    108,687.70x = 8,092,674,200.99
  5. Step 5: Solve for x
    x = 8,092,674,200.99/108,687.70
  6. Step 6: Final answer
    x = 74,458.05

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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.