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Finding the Fourth Proportional to 108,775.62, 149,830.66 and 76,889.70

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Solution

The fourth proportional to 108,775.62, 149,830.66 and 76,889.70 is: 105,910.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,775.62 : 149,830.66 = 76,889.70 : x
  2. Step 2: Convert to fraction form
    108,775.62/149,830.66 = 76,889.70/x
  3. Step 3: Cross multiply
    108,775.62x = 149,830.66 × 76,889.70
  4. Step 4: Simplify right side
    108,775.62x = 11,520,434,498.20
  5. Step 5: Solve for x
    x = 11,520,434,498.20/108,775.62
  6. Step 6: Final answer
    x = 105,910.08

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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.