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Finding the Fourth Proportional to 112,907.87, 155,813.08 and 61,920.96

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Solution

The fourth proportional to 112,907.87, 155,813.08 and 61,920.96 is: 85,451.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,907.87 : 155,813.08 = 61,920.96 : x
  2. Step 2: Convert to fraction form
    112,907.87/155,813.08 = 61,920.96/x
  3. Step 3: Cross multiply
    112,907.87x = 155,813.08 × 61,920.96
  4. Step 4: Simplify right side
    112,907.87x = 9,648,094,405.49
  5. Step 5: Solve for x
    x = 9,648,094,405.49/112,907.87
  6. Step 6: Final answer
    x = 85,451.04

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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.