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Finding the Fourth Proportional to 118,507.50, 163,540.44 and 68,206.50

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Solution

The fourth proportional to 118,507.50, 163,540.44 and 68,206.50 is: 94,125.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,507.50 : 163,540.44 = 68,206.50 : x
  2. Step 2: Convert to fraction form
    118,507.50/163,540.44 = 68,206.50/x
  3. Step 3: Cross multiply
    118,507.50x = 163,540.44 × 68,206.50
  4. Step 4: Simplify right side
    118,507.50x = 11,154,521,020.86
  5. Step 5: Solve for x
    x = 11,154,521,020.86/118,507.50
  6. Step 6: Final answer
    x = 94,125.02

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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.