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Finding the Fourth Proportional to 74,509.75, 111,764.90 and 70,772.41

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Solution

The fourth proportional to 74,509.75, 111,764.90 and 70,772.41 is: 106,158.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,509.75 : 111,764.90 = 70,772.41 : x
  2. Step 2: Convert to fraction form
    74,509.75/111,764.90 = 70,772.41/x
  3. Step 3: Cross multiply
    74,509.75x = 111,764.90 × 70,772.41
  4. Step 4: Simplify right side
    74,509.75x = 7,909,871,326.41
  5. Step 5: Solve for x
    x = 7,909,871,326.41/74,509.75
  6. Step 6: Final answer
    x = 106,158.88

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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.