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Finding the Fourth Proportional to 74,700.70, 111,853.31 and 61,611.50

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Solution

The fourth proportional to 74,700.70, 111,853.31 and 61,611.50 is: 92,254.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,700.70 : 111,853.31 = 61,611.50 : x
  2. Step 2: Convert to fraction form
    74,700.70/111,853.31 = 61,611.50/x
  3. Step 3: Cross multiply
    74,700.70x = 111,853.31 × 61,611.50
  4. Step 4: Simplify right side
    74,700.70x = 6,891,450,180.64
  5. Step 5: Solve for x
    x = 6,891,450,180.64/74,700.70
  6. Step 6: Final answer
    x = 92,254.16

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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.