Home / 138,318.67-190,877.89-77,890.04

Finding the Fourth Proportional to 138,318.67, 190,877.89 and 77,890.04

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Solution

The fourth proportional to 138,318.67, 190,877.89 and 77,890.04 is: 107,487.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,318.67 : 190,877.89 = 77,890.04 : x
  2. Step 2: Convert to fraction form
    138,318.67/190,877.89 = 77,890.04/x
  3. Step 3: Cross multiply
    138,318.67x = 190,877.89 × 77,890.04
  4. Step 4: Simplify right side
    138,318.67x = 14,867,485,338.10
  5. Step 5: Solve for x
    x = 14,867,485,338.10/138,318.67
  6. Step 6: Final answer
    x = 107,487.19

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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.