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Finding the Fourth Proportional to 108,666.36, 149,892.12 and 70,939.80

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Solution

The fourth proportional to 108,666.36, 149,892.12 and 70,939.80 is: 97,852.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,666.36 : 149,892.12 = 70,939.80 : x
  2. Step 2: Convert to fraction form
    108,666.36/149,892.12 = 70,939.80/x
  3. Step 3: Cross multiply
    108,666.36x = 149,892.12 × 70,939.80
  4. Step 4: Simplify right side
    108,666.36x = 10,633,317,014.38
  5. Step 5: Solve for x
    x = 10,633,317,014.38/108,666.36
  6. Step 6: Final answer
    x = 97,852.89

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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.