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Finding the Fourth Proportional to 139,415.41, 209,122.70 and 39,575.69

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Solution

The fourth proportional to 139,415.41, 209,122.70 and 39,575.69 is: 59,363.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,415.41 : 209,122.70 = 39,575.69 : x
  2. Step 2: Convert to fraction form
    139,415.41/209,122.70 = 39,575.69/x
  3. Step 3: Cross multiply
    139,415.41x = 209,122.70 × 39,575.69
  4. Step 4: Simplify right side
    139,415.41x = 8,276,174,949.28
  5. Step 5: Solve for x
    x = 8,276,174,949.28/139,415.41
  6. Step 6: Final answer
    x = 59,363.42

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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.