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Finding the Fourth Proportional to 170,700, 256,074.33 and 90,717.12

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Solution

The fourth proportional to 170,700, 256,074.33 and 90,717.12 is: 136,088.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,700 : 256,074.33 = 90,717.12 : x
  2. Step 2: Convert to fraction form
    170,700/256,074.33 = 90,717.12/x
  3. Step 3: Cross multiply
    170,700x = 256,074.33 × 90,717.12
  4. Step 4: Simplify right side
    170,700x = 23,230,325,723.53
  5. Step 5: Solve for x
    x = 23,230,325,723.53/170,700
  6. Step 6: Final answer
    x = 136,088.61

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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.