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Finding the Fourth Proportional to 108,748.80, 163,123.20 and 79,005.60

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Solution

The fourth proportional to 108,748.80, 163,123.20 and 79,005.60 is: 118,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,748.80 : 163,123.20 = 79,005.60 : x
  2. Step 2: Convert to fraction form
    108,748.80/163,123.20 = 79,005.60/x
  3. Step 3: Cross multiply
    108,748.80x = 163,123.20 × 79,005.60
  4. Step 4: Simplify right side
    108,748.80x = 12,887,646,289.92
  5. Step 5: Solve for x
    x = 12,887,646,289.92/108,748.80
  6. Step 6: Final answer
    x = 118,508.40

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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.