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Finding the Fourth Proportional to 98,995.50, 136,675.53 and 68,770.62

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Solution

The fourth proportional to 98,995.50, 136,675.53 and 68,770.62 is: 94,946.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,995.50 : 136,675.53 = 68,770.62 : x
  2. Step 2: Convert to fraction form
    98,995.50/136,675.53 = 68,770.62/x
  3. Step 3: Cross multiply
    98,995.50x = 136,675.53 × 68,770.62
  4. Step 4: Simplify right side
    98,995.50x = 9,399,260,936.93
  5. Step 5: Solve for x
    x = 9,399,260,936.93/98,995.50
  6. Step 6: Final answer
    x = 94,946.35

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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.