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Finding the Fourth Proportional to 108,372.70, 149,558.90 and 66,988.89

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Solution

The fourth proportional to 108,372.70, 149,558.90 and 66,988.89 is: 92,447.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,372.70 : 149,558.90 = 66,988.89 : x
  2. Step 2: Convert to fraction form
    108,372.70/149,558.90 = 66,988.89/x
  3. Step 3: Cross multiply
    108,372.70x = 149,558.90 × 66,988.89
  4. Step 4: Simplify right side
    108,372.70x = 10,018,784,700.62
  5. Step 5: Solve for x
    x = 10,018,784,700.62/108,372.70
  6. Step 6: Final answer
    x = 92,447.50

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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.