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Finding the Fourth Proportional to 111,810.30, 167,715.45 and 90,815.10

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Solution

The fourth proportional to 111,810.30, 167,715.45 and 90,815.10 is: 136,222.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,810.30 : 167,715.45 = 90,815.10 : x
  2. Step 2: Convert to fraction form
    111,810.30/167,715.45 = 90,815.10/x
  3. Step 3: Cross multiply
    111,810.30x = 167,715.45 × 90,815.10
  4. Step 4: Simplify right side
    111,810.30x = 15,231,095,363.30
  5. Step 5: Solve for x
    x = 15,231,095,363.30/111,810.30
  6. Step 6: Final answer
    x = 136,222.65

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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.