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Finding the Fourth Proportional to 65,020.69, 89,728.65 and 35,212.69

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Solution

The fourth proportional to 65,020.69, 89,728.65 and 35,212.69 is: 48,593.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,020.69 : 89,728.65 = 35,212.69 : x
  2. Step 2: Convert to fraction form
    65,020.69/89,728.65 = 35,212.69/x
  3. Step 3: Cross multiply
    65,020.69x = 89,728.65 × 35,212.69
  4. Step 4: Simplify right side
    65,020.69x = 3,159,587,136.57
  5. Step 5: Solve for x
    x = 3,159,587,136.57/65,020.69
  6. Step 6: Final answer
    x = 48,593.57

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1.5x scale

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.