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Finding the Fourth Proportional to 112,842.70, 155,715.72 and 61,846.42

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Solution

The fourth proportional to 112,842.70, 155,715.72 and 61,846.42 is: 85,344.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,842.70 : 155,715.72 = 61,846.42 : x
  2. Step 2: Convert to fraction form
    112,842.70/155,715.72 = 61,846.42/x
  3. Step 3: Cross multiply
    112,842.70x = 155,715.72 × 61,846.42
  4. Step 4: Simplify right side
    112,842.70x = 9,630,459,819.72
  5. Step 5: Solve for x
    x = 9,630,459,819.72/112,842.70
  6. Step 6: Final answer
    x = 85,344.11

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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.