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Finding the Fourth Proportional to 111,989, 154,548.06 and 61,691.24

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Solution

The fourth proportional to 111,989, 154,548.06 and 61,691.24 is: 85,135.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,989 : 154,548.06 = 61,691.24 : x
  2. Step 2: Convert to fraction form
    111,989/154,548.06 = 61,691.24/x
  3. Step 3: Cross multiply
    111,989x = 154,548.06 × 61,691.24
  4. Step 4: Simplify right side
    111,989x = 9,534,261,460.99
  5. Step 5: Solve for x
    x = 9,534,261,460.99/111,989
  6. Step 6: Final answer
    x = 85,135.70

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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.