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Finding the Fourth Proportional to 101,018, 139,380.60 and 65,200.40

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Solution

The fourth proportional to 101,018, 139,380.60 and 65,200.40 is: 89,960.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,018 : 139,380.60 = 65,200.40 : x
  2. Step 2: Convert to fraction form
    101,018/139,380.60 = 65,200.40/x
  3. Step 3: Cross multiply
    101,018x = 139,380.60 × 65,200.40
  4. Step 4: Simplify right side
    101,018x = 9,087,670,872.24
  5. Step 5: Solve for x
    x = 9,087,670,872.24/101,018
  6. Step 6: Final answer
    x = 89,960.91

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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.