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Finding the Fourth Proportional to 111,960.16, 154,505.28 and 61,658.08

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Solution

The fourth proportional to 111,960.16, 154,505.28 and 61,658.08 is: 85,088.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,960.16 : 154,505.28 = 61,658.08 : x
  2. Step 2: Convert to fraction form
    111,960.16/154,505.28 = 61,658.08/x
  3. Step 3: Cross multiply
    111,960.16x = 154,505.28 × 61,658.08
  4. Step 4: Simplify right side
    111,960.16x = 9,526,498,914.66
  5. Step 5: Solve for x
    x = 9,526,498,914.66/111,960.16
  6. Step 6: Final answer
    x = 85,088.29

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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.