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Finding the Fourth Proportional to 85,512.65, 128,294.69 and 60,600.69

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Solution

The fourth proportional to 85,512.65, 128,294.69 and 60,600.69 is: 90,919.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,512.65 : 128,294.69 = 60,600.69 : x
  2. Step 2: Convert to fraction form
    85,512.65/128,294.69 = 60,600.69/x
  3. Step 3: Cross multiply
    85,512.65x = 128,294.69 × 60,600.69
  4. Step 4: Simplify right side
    85,512.65x = 7,774,746,434.33
  5. Step 5: Solve for x
    x = 7,774,746,434.33/85,512.65
  6. Step 6: Final answer
    x = 90,919.26

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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.