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Finding the Fourth Proportional to 130,005.80, 194,619.90 and 77,388.20

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Solution

The fourth proportional to 130,005.80, 194,619.90 and 77,388.20 is: 115,850.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,005.80 : 194,619.90 = 77,388.20 : x
  2. Step 2: Convert to fraction form
    130,005.80/194,619.90 = 77,388.20/x
  3. Step 3: Cross multiply
    130,005.80x = 194,619.90 × 77,388.20
  4. Step 4: Simplify right side
    130,005.80x = 15,061,283,745.18
  5. Step 5: Solve for x
    x = 15,061,283,745.18/130,005.80
  6. Step 6: Final answer
    x = 115,850.86

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1.5x scale

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.