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Finding the Fourth Proportional to 139,030.70, 208,546.05 and 94,415.90

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Solution

The fourth proportional to 139,030.70, 208,546.05 and 94,415.90 is: 141,623.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,030.70 : 208,546.05 = 94,415.90 : x
  2. Step 2: Convert to fraction form
    139,030.70/208,546.05 = 94,415.90/x
  3. Step 3: Cross multiply
    139,030.70x = 208,546.05 × 94,415.90
  4. Step 4: Simplify right side
    139,030.70x = 19,690,063,002.20
  5. Step 5: Solve for x
    x = 19,690,063,002.20/139,030.70
  6. Step 6: Final answer
    x = 141,623.85

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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.