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Finding the Fourth Proportional to 72,903.70, 109,136.85 and 43,306.30

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Solution

The fourth proportional to 72,903.70, 109,136.85 and 43,306.30 is: 64,829.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,903.70 : 109,136.85 = 43,306.30 : x
  2. Step 2: Convert to fraction form
    72,903.70/109,136.85 = 43,306.30/x
  3. Step 3: Cross multiply
    72,903.70x = 109,136.85 × 43,306.30
  4. Step 4: Simplify right side
    72,903.70x = 4,726,313,167.16
  5. Step 5: Solve for x
    x = 4,726,313,167.16/72,903.70
  6. Step 6: Final answer
    x = 64,829.54

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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.