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Finding the Fourth Proportional to 112,805.46, 155,671.72 and 61,810.09

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Solution

The fourth proportional to 112,805.46, 155,671.72 and 61,810.09 is: 85,298.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,805.46 : 155,671.72 = 61,810.09 : x
  2. Step 2: Convert to fraction form
    112,805.46/155,671.72 = 61,810.09/x
  3. Step 3: Cross multiply
    112,805.46x = 155,671.72 × 61,810.09
  4. Step 4: Simplify right side
    112,805.46x = 9,622,082,479.95
  5. Step 5: Solve for x
    x = 9,622,082,479.95/112,805.46
  6. Step 6: Final answer
    x = 85,298.02

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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.