Home / 85,136.48-117,427.92-72,301.04

Finding the Fourth Proportional to 85,136.48, 117,427.92 and 72,301.04

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Solution

The fourth proportional to 85,136.48, 117,427.92 and 72,301.04 is: 99,724.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,136.48 : 117,427.92 = 72,301.04 : x
  2. Step 2: Convert to fraction form
    85,136.48/117,427.92 = 72,301.04/x
  3. Step 3: Cross multiply
    85,136.48x = 117,427.92 × 72,301.04
  4. Step 4: Simplify right side
    85,136.48x = 8,490,160,741.04
  5. Step 5: Solve for x
    x = 8,490,160,741.04/85,136.48
  6. Step 6: Final answer
    x = 99,724.12

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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.