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Finding the Fourth Proportional to 100,949.88, 139,323.06 and 58,510.20

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Solution

The fourth proportional to 100,949.88, 139,323.06 and 58,510.20 is: 80,751.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,949.88 : 139,323.06 = 58,510.20 : x
  2. Step 2: Convert to fraction form
    100,949.88/139,323.06 = 58,510.20/x
  3. Step 3: Cross multiply
    100,949.88x = 139,323.06 × 58,510.20
  4. Step 4: Simplify right side
    100,949.88x = 8,151,820,105.21
  5. Step 5: Solve for x
    x = 8,151,820,105.21/100,949.88
  6. Step 6: Final answer
    x = 80,751.16

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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.