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Finding the Fourth Proportional to 113,011.30, 169,205.90 and 91,901.89

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Solution

The fourth proportional to 113,011.30, 169,205.90 and 91,901.89 is: 137,599.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,011.30 : 169,205.90 = 91,901.89 : x
  2. Step 2: Convert to fraction form
    113,011.30/169,205.90 = 91,901.89/x
  3. Step 3: Cross multiply
    113,011.30x = 169,205.90 × 91,901.89
  4. Step 4: Simplify right side
    113,011.30x = 15,550,341,163.12
  5. Step 5: Solve for x
    x = 15,550,341,163.12/113,011.30
  6. Step 6: Final answer
    x = 137,599.88

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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.