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Finding the Fourth Proportional to 112,493.60, 168,740.40 and 45,911.60

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Solution

The fourth proportional to 112,493.60, 168,740.40 and 45,911.60 is: 68,867.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,493.60 : 168,740.40 = 45,911.60 : x
  2. Step 2: Convert to fraction form
    112,493.60/168,740.40 = 45,911.60/x
  3. Step 3: Cross multiply
    112,493.60x = 168,740.40 × 45,911.60
  4. Step 4: Simplify right side
    112,493.60x = 7,747,141,748.64
  5. Step 5: Solve for x
    x = 7,747,141,748.64/112,493.60
  6. Step 6: Final answer
    x = 68,867.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.