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Finding the Fourth Proportional to 108,439.65, 149,646.70 and 60,693

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Solution

The fourth proportional to 108,439.65, 149,646.70 and 60,693 is: 83,756.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,439.65 : 149,646.70 = 60,693 : x
  2. Step 2: Convert to fraction form
    108,439.65/149,646.70 = 60,693/x
  3. Step 3: Cross multiply
    108,439.65x = 149,646.70 × 60,693
  4. Step 4: Simplify right side
    108,439.65x = 9,082,507,163.10
  5. Step 5: Solve for x
    x = 9,082,507,163.10/108,439.65
  6. Step 6: Final answer
    x = 83,756.33

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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.