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Finding the Fourth Proportional to 77,865.75, 116,813.21 and 36,312.75

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Solution

The fourth proportional to 77,865.75, 116,813.21 and 36,312.75 is: 54,475.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,865.75 : 116,813.21 = 36,312.75 : x
  2. Step 2: Convert to fraction form
    77,865.75/116,813.21 = 36,312.75/x
  3. Step 3: Cross multiply
    77,865.75x = 116,813.21 × 36,312.75
  4. Step 4: Simplify right side
    77,865.75x = 4,241,808,709.86
  5. Step 5: Solve for x
    x = 4,241,808,709.86/77,865.75
  6. Step 6: Final answer
    x = 54,475.92

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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.