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Finding the Fourth Proportional to 139,437.10, 209,593.05 and 136,812.70

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Solution

The fourth proportional to 139,437.10, 209,593.05 and 136,812.70 is: 205,648.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,437.10 : 209,593.05 = 136,812.70 : x
  2. Step 2: Convert to fraction form
    139,437.10/209,593.05 = 136,812.70/x
  3. Step 3: Cross multiply
    139,437.10x = 209,593.05 × 136,812.70
  4. Step 4: Simplify right side
    139,437.10x = 28,674,991,071.74
  5. Step 5: Solve for x
    x = 28,674,991,071.74/139,437.10
  6. Step 6: Final answer
    x = 205,648.22

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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.