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Finding the Fourth Proportional to 111,990.30, 154,546.62 and 61,689.30

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Solution

The fourth proportional to 111,990.30, 154,546.62 and 61,689.30 is: 85,131.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,990.30 : 154,546.62 = 61,689.30 : x
  2. Step 2: Convert to fraction form
    111,990.30/154,546.62 = 61,689.30/x
  3. Step 3: Cross multiply
    111,990.30x = 154,546.62 × 61,689.30
  4. Step 4: Simplify right side
    111,990.30x = 9,533,872,805.17
  5. Step 5: Solve for x
    x = 9,533,872,805.17/111,990.30
  6. Step 6: Final answer
    x = 85,131.24

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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.