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Finding the Fourth Proportional to 108,005.80, 162,008.70 and 72,754.60

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Solution

The fourth proportional to 108,005.80, 162,008.70 and 72,754.60 is: 109,131.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,005.80 : 162,008.70 = 72,754.60 : x
  2. Step 2: Convert to fraction form
    108,005.80/162,008.70 = 72,754.60/x
  3. Step 3: Cross multiply
    108,005.80x = 162,008.70 × 72,754.60
  4. Step 4: Simplify right side
    108,005.80x = 11,786,878,165.02
  5. Step 5: Solve for x
    x = 11,786,878,165.02/108,005.80
  6. Step 6: Final answer
    x = 109,131.90

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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.