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Finding the Fourth Proportional to 101,278.90, 139,736.44 and 58,256.15

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Solution

The fourth proportional to 101,278.90, 139,736.44 and 58,256.15 is: 80,377.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,278.90 : 139,736.44 = 58,256.15 : x
  2. Step 2: Convert to fraction form
    101,278.90/139,736.44 = 58,256.15/x
  3. Step 3: Cross multiply
    101,278.90x = 139,736.44 × 58,256.15
  4. Step 4: Simplify right side
    101,278.90x = 8,140,507,009.11
  5. Step 5: Solve for x
    x = 8,140,507,009.11/101,278.90
  6. Step 6: Final answer
    x = 80,377.13

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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.