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Finding the Fourth Proportional to 111,447, 153,795.60 and 61,146

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Solution

The fourth proportional to 111,447, 153,795.60 and 61,146 is: 84,380.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,447 : 153,795.60 = 61,146 : x
  2. Step 2: Convert to fraction form
    111,447/153,795.60 = 61,146/x
  3. Step 3: Cross multiply
    111,447x = 153,795.60 × 61,146
  4. Step 4: Simplify right side
    111,447x = 9,403,985,757.60
  5. Step 5: Solve for x
    x = 9,403,985,757.60/111,447
  6. Step 6: Final answer
    x = 84,380.79

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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.