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Finding the Fourth Proportional to 208,320.45, 287,480.79 and 112,824.96

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Solution

The fourth proportional to 208,320.45, 287,480.79 and 112,824.96 is: 155,697.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,320.45 : 287,480.79 = 112,824.96 : x
  2. Step 2: Convert to fraction form
    208,320.45/287,480.79 = 112,824.96/x
  3. Step 3: Cross multiply
    208,320.45x = 287,480.79 × 112,824.96
  4. Step 4: Simplify right side
    208,320.45x = 32,435,008,632.52
  5. Step 5: Solve for x
    x = 32,435,008,632.52/208,320.45
  6. Step 6: Final answer
    x = 155,697.67

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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.