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Finding the Fourth Proportional to 101,178.70, 139,631.11 and 58,172.13

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Solution

The fourth proportional to 101,178.70, 139,631.11 and 58,172.13 is: 80,280.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,178.70 : 139,631.11 = 58,172.13 : x
  2. Step 2: Convert to fraction form
    101,178.70/139,631.11 = 58,172.13/x
  3. Step 3: Cross multiply
    101,178.70x = 139,631.11 × 58,172.13
  4. Step 4: Simplify right side
    101,178.70x = 8,122,638,937.53
  5. Step 5: Solve for x
    x = 8,122,638,937.53/101,178.70
  6. Step 6: Final answer
    x = 80,280.13

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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.