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Finding the Fourth Proportional to 139,068.40, 208,618.80 and 50,363.68

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Solution

The fourth proportional to 139,068.40, 208,618.80 and 50,363.68 is: 75,551.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,068.40 : 208,618.80 = 50,363.68 : x
  2. Step 2: Convert to fraction form
    139,068.40/208,618.80 = 50,363.68/x
  3. Step 3: Cross multiply
    139,068.40x = 208,618.80 × 50,363.68
  4. Step 4: Simplify right side
    139,068.40x = 10,506,810,485.18
  5. Step 5: Solve for x
    x = 10,506,810,485.18/139,068.40
  6. Step 6: Final answer
    x = 75,551.39

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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.