Home / 85,139.79-117,513.23-49,349.54

Finding the Fourth Proportional to 85,139.79, 117,513.23 and 49,349.54

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Solution

The fourth proportional to 85,139.79, 117,513.23 and 49,349.54 is: 68,114.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,139.79 : 117,513.23 = 49,349.54 : x
  2. Step 2: Convert to fraction form
    85,139.79/117,513.23 = 49,349.54/x
  3. Step 3: Cross multiply
    85,139.79x = 117,513.23 × 49,349.54
  4. Step 4: Simplify right side
    85,139.79x = 5,799,223,010.10
  5. Step 5: Solve for x
    x = 5,799,223,010.10/85,139.79
  6. Step 6: Final answer
    x = 68,114.13

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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.