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Finding the Fourth Proportional to 100,899.81, 139,241.78 and 58,482.95

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Solution

The fourth proportional to 100,899.81, 139,241.78 and 58,482.95 is: 80,706.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,899.81 : 139,241.78 = 58,482.95 : x
  2. Step 2: Convert to fraction form
    100,899.81/139,241.78 = 58,482.95/x
  3. Step 3: Cross multiply
    100,899.81x = 139,241.78 × 58,482.95
  4. Step 4: Simplify right side
    100,899.81x = 8,143,270,057.65
  5. Step 5: Solve for x
    x = 8,143,270,057.65/100,899.81
  6. Step 6: Final answer
    x = 80,706.50

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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.