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Finding the Fourth Proportional to 100,887.86, 139,220.72 and 57,836.48

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Solution

The fourth proportional to 100,887.86, 139,220.72 and 57,836.48 is: 79,811.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,887.86 : 139,220.72 = 57,836.48 : x
  2. Step 2: Convert to fraction form
    100,887.86/139,220.72 = 57,836.48/x
  3. Step 3: Cross multiply
    100,887.86x = 139,220.72 × 57,836.48
  4. Step 4: Simplify right side
    100,887.86x = 8,052,035,402.58
  5. Step 5: Solve for x
    x = 8,052,035,402.58/100,887.86
  6. Step 6: Final answer
    x = 79,811.74

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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.