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Finding the Fourth Proportional to 100,806.40, 139,110.96 and 58,363.84

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Solution

The fourth proportional to 100,806.40, 139,110.96 and 58,363.84 is: 80,541.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,806.40 : 139,110.96 = 58,363.84 : x
  2. Step 2: Convert to fraction form
    100,806.40/139,110.96 = 58,363.84/x
  3. Step 3: Cross multiply
    100,806.40x = 139,110.96 × 58,363.84
  4. Step 4: Simplify right side
    100,806.40x = 8,119,049,811.69
  5. Step 5: Solve for x
    x = 8,119,049,811.69/100,806.40
  6. Step 6: Final answer
    x = 80,541.02

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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.