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Finding the Fourth Proportional to 139,065.72, 208,383.84 and 93,910.08

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Solution

The fourth proportional to 139,065.72, 208,383.84 and 93,910.08 is: 140,720.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,065.72 : 208,383.84 = 93,910.08 : x
  2. Step 2: Convert to fraction form
    139,065.72/208,383.84 = 93,910.08/x
  3. Step 3: Cross multiply
    139,065.72x = 208,383.84 × 93,910.08
  4. Step 4: Simplify right side
    139,065.72x = 19,569,343,085.11
  5. Step 5: Solve for x
    x = 19,569,343,085.11/139,065.72
  6. Step 6: Final answer
    x = 140,720.11

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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.