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Finding the Fourth Proportional to 91,136.04, 136,710.54 and 28,806

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Solution

The fourth proportional to 91,136.04, 136,710.54 and 28,806 is: 43,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,136.04 : 136,710.54 = 28,806 : x
  2. Step 2: Convert to fraction form
    91,136.04/136,710.54 = 28,806/x
  3. Step 3: Cross multiply
    91,136.04x = 136,710.54 × 28,806
  4. Step 4: Simplify right side
    91,136.04x = 3,938,083,815.24
  5. Step 5: Solve for x
    x = 3,938,083,815.24/91,136.04
  6. Step 6: Final answer
    x = 43,211.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.