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Finding the Fourth Proportional to 139,107.46, 208,681.98 and 50,381.68

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Solution

The fourth proportional to 139,107.46, 208,681.98 and 50,381.68 is: 75,580.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,107.46 : 208,681.98 = 50,381.68 : x
  2. Step 2: Convert to fraction form
    139,107.46/208,681.98 = 50,381.68/x
  3. Step 3: Cross multiply
    139,107.46x = 208,681.98 × 50,381.68
  4. Step 4: Simplify right side
    139,107.46x = 10,513,748,738.13
  5. Step 5: Solve for x
    x = 10,513,748,738.13/139,107.46
  6. Step 6: Final answer
    x = 75,580.05

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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.