Home / 85,487.36-117,987.60-49,688.48

Finding the Fourth Proportional to 85,487.36, 117,987.60 and 49,688.48

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Solution

The fourth proportional to 85,487.36, 117,987.60 and 49,688.48 is: 68,578.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,487.36 : 117,987.60 = 49,688.48 : x
  2. Step 2: Convert to fraction form
    85,487.36/117,987.60 = 49,688.48/x
  3. Step 3: Cross multiply
    85,487.36x = 117,987.60 × 49,688.48
  4. Step 4: Simplify right side
    85,487.36x = 5,862,624,502.85
  5. Step 5: Solve for x
    x = 5,862,624,502.85/85,487.36
  6. Step 6: Final answer
    x = 68,578.85

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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.