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Finding the Fourth Proportional to 112,644.95, 155,443.28 and 61,647.53

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Solution

The fourth proportional to 112,644.95, 155,443.28 and 61,647.53 is: 85,069.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,644.95 : 155,443.28 = 61,647.53 : x
  2. Step 2: Convert to fraction form
    112,644.95/155,443.28 = 61,647.53/x
  3. Step 3: Cross multiply
    112,644.95x = 155,443.28 × 61,647.53
  4. Step 4: Simplify right side
    112,644.95x = 9,582,693,181.64
  5. Step 5: Solve for x
    x = 9,582,693,181.64/112,644.95
  6. Step 6: Final answer
    x = 85,069.89

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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.