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Finding the Fourth Proportional to 111,702.40, 154,144.56 and 61,401.28

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Solution

The fourth proportional to 111,702.40, 154,144.56 and 61,401.28 is: 84,731.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,702.40 : 154,144.56 = 61,401.28 : x
  2. Step 2: Convert to fraction form
    111,702.40/154,144.56 = 61,401.28/x
  3. Step 3: Cross multiply
    111,702.40x = 154,144.56 × 61,401.28
  4. Step 4: Simplify right side
    111,702.40x = 9,464,673,289.04
  5. Step 5: Solve for x
    x = 9,464,673,289.04/111,702.40
  6. Step 6: Final answer
    x = 84,731.15

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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.