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Finding the Fourth Proportional to 118,109.61, 162,965.93 and 70,378.74

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Solution

The fourth proportional to 118,109.61, 162,965.93 and 70,378.74 is: 97,107.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,109.61 : 162,965.93 = 70,378.74 : x
  2. Step 2: Convert to fraction form
    118,109.61/162,965.93 = 70,378.74/x
  3. Step 3: Cross multiply
    118,109.61x = 162,965.93 × 70,378.74
  4. Step 4: Simplify right side
    118,109.61x = 11,469,336,464.43
  5. Step 5: Solve for x
    x = 11,469,336,464.43/118,109.61
  6. Step 6: Final answer
    x = 97,107.56

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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.