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Finding the Fourth Proportional to 112,125.70, 154,732.90 and 61,824.70

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Solution

The fourth proportional to 112,125.70, 154,732.90 and 61,824.70 is: 85,317.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,125.70 : 154,732.90 = 61,824.70 : x
  2. Step 2: Convert to fraction form
    112,125.70/154,732.90 = 61,824.70/x
  3. Step 3: Cross multiply
    112,125.70x = 154,732.90 × 61,824.70
  4. Step 4: Simplify right side
    112,125.70x = 9,566,314,039.84
  5. Step 5: Solve for x
    x = 9,566,314,039.84/112,125.70
  6. Step 6: Final answer
    x = 85,317.77

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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.