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Finding the Fourth Proportional to 228,591.09, 342,909.21 and 78,811.69

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Solution

The fourth proportional to 228,591.09, 342,909.21 and 78,811.69 is: 118,225.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,591.09 : 342,909.21 = 78,811.69 : x
  2. Step 2: Convert to fraction form
    228,591.09/342,909.21 = 78,811.69/x
  3. Step 3: Cross multiply
    228,591.09x = 342,909.21 × 78,811.69
  4. Step 4: Simplify right side
    228,591.09x = 27,025,254,356.66
  5. Step 5: Solve for x
    x = 27,025,254,356.66/228,591.09
  6. Step 6: Final answer
    x = 118,225.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.