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Finding the Fourth Proportional to 78,809.35, 118,212.88 and 36,665.86

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Solution

The fourth proportional to 78,809.35, 118,212.88 and 36,665.86 is: 54,998.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,809.35 : 118,212.88 = 36,665.86 : x
  2. Step 2: Convert to fraction form
    78,809.35/118,212.88 = 36,665.86/x
  3. Step 3: Cross multiply
    78,809.35x = 118,212.88 × 36,665.86
  4. Step 4: Simplify right side
    78,809.35x = 4,334,376,724.95
  5. Step 5: Solve for x
    x = 4,334,376,724.95/78,809.35
  6. Step 6: Final answer
    x = 54,998.25

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1.5x scale

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.