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Finding the Fourth Proportional to 85,136.90, 127,718.85 and 28,982.30

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Solution

The fourth proportional to 85,136.90, 127,718.85 and 28,982.30 is: 43,478.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,136.90 : 127,718.85 = 28,982.30 : x
  2. Step 2: Convert to fraction form
    85,136.90/127,718.85 = 28,982.30/x
  3. Step 3: Cross multiply
    85,136.90x = 127,718.85 × 28,982.30
  4. Step 4: Simplify right side
    85,136.90x = 3,701,586,026.36
  5. Step 5: Solve for x
    x = 3,701,586,026.36/85,136.90
  6. Step 6: Final answer
    x = 43,478.05

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1.5x scale

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.