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Finding the Fourth Proportional to 111,812.19, 167,719.17 and 40,785.72

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Solution

The fourth proportional to 111,812.19, 167,719.17 and 40,785.72 is: 61,178.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,812.19 : 167,719.17 = 40,785.72 : x
  2. Step 2: Convert to fraction form
    111,812.19/167,719.17 = 40,785.72/x
  3. Step 3: Cross multiply
    111,812.19x = 167,719.17 × 40,785.72
  4. Step 4: Simplify right side
    111,812.19x = 6,840,547,106.25
  5. Step 5: Solve for x
    x = 6,840,547,106.25/111,812.19
  6. Step 6: Final answer
    x = 61,178.90

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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.