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Finding the Fourth Proportional to 69,238.90, 103,639.65 and 54,367.30

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Solution

The fourth proportional to 69,238.90, 103,639.65 and 54,367.30 is: 81,379.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,238.90 : 103,639.65 = 54,367.30 : x
  2. Step 2: Convert to fraction form
    69,238.90/103,639.65 = 54,367.30/x
  3. Step 3: Cross multiply
    69,238.90x = 103,639.65 × 54,367.30
  4. Step 4: Simplify right side
    69,238.90x = 5,634,607,943.45
  5. Step 5: Solve for x
    x = 5,634,607,943.45/69,238.90
  6. Step 6: Final answer
    x = 81,379.22

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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.