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Finding the Fourth Proportional to 108,671.06, 149,910.46 and 72,434.90

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Solution

The fourth proportional to 108,671.06, 149,910.46 and 72,434.90 is: 99,923.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,671.06 : 149,910.46 = 72,434.90 : x
  2. Step 2: Convert to fraction form
    108,671.06/149,910.46 = 72,434.90/x
  3. Step 3: Cross multiply
    108,671.06x = 149,910.46 × 72,434.90
  4. Step 4: Simplify right side
    108,671.06x = 10,858,748,248.41
  5. Step 5: Solve for x
    x = 10,858,748,248.41/108,671.06
  6. Step 6: Final answer
    x = 99,923.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.