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Finding the Fourth Proportional to 112,215.42, 154,857.20 and 61,914.42

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Solution

The fourth proportional to 112,215.42, 154,857.20 and 61,914.42 is: 85,441.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,215.42 : 154,857.20 = 61,914.42 : x
  2. Step 2: Convert to fraction form
    112,215.42/154,857.20 = 61,914.42/x
  3. Step 3: Cross multiply
    112,215.42x = 154,857.20 × 61,914.42
  4. Step 4: Simplify right side
    112,215.42x = 9,587,893,411.25
  5. Step 5: Solve for x
    x = 9,587,893,411.25/112,215.42
  6. Step 6: Final answer
    x = 85,441.85

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1.5x scale

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.