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Finding the Fourth Proportional to 101,129.93, 139,499.17 and 65,341.04

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Solution

The fourth proportional to 101,129.93, 139,499.17 and 65,341.04 is: 90,131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,129.93 : 139,499.17 = 65,341.04 : x
  2. Step 2: Convert to fraction form
    101,129.93/139,499.17 = 65,341.04/x
  3. Step 3: Cross multiply
    101,129.93x = 139,499.17 × 65,341.04
  4. Step 4: Simplify right side
    101,129.93x = 9,115,020,846.94
  5. Step 5: Solve for x
    x = 9,115,020,846.94/101,129.93
  6. Step 6: Final answer
    x = 90,131.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.