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Finding the Fourth Proportional to 139,702, 209,407.13 and 64,760.35

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Solution

The fourth proportional to 139,702, 209,407.13 and 64,760.35 is: 97,072.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,702 : 209,407.13 = 64,760.35 : x
  2. Step 2: Convert to fraction form
    139,702/209,407.13 = 64,760.35/x
  3. Step 3: Cross multiply
    139,702x = 209,407.13 × 64,760.35
  4. Step 4: Simplify right side
    139,702x = 13,561,278,707.49
  5. Step 5: Solve for x
    x = 13,561,278,707.49/139,702
  6. Step 6: Final answer
    x = 97,072.90

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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.