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Finding the Fourth Proportional to 112,258.87, 168,148.89 and 90,819.59

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Solution

The fourth proportional to 112,258.87, 168,148.89 and 90,819.59 is: 136,035.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,258.87 : 168,148.89 = 90,819.59 : x
  2. Step 2: Convert to fraction form
    112,258.87/168,148.89 = 90,819.59/x
  3. Step 3: Cross multiply
    112,258.87x = 168,148.89 × 90,819.59
  4. Step 4: Simplify right side
    112,258.87x = 15,271,213,248.76
  5. Step 5: Solve for x
    x = 15,271,213,248.76/112,258.87
  6. Step 6: Final answer
    x = 136,035.69

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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.