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Finding the Fourth Proportional to 78,809.28, 118,241.88 and 48,448.92

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Solution

The fourth proportional to 78,809.28, 118,241.88 and 48,448.92 is: 72,690.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,809.28 : 118,241.88 = 48,448.92 : x
  2. Step 2: Convert to fraction form
    78,809.28/118,241.88 = 48,448.92/x
  3. Step 3: Cross multiply
    78,809.28x = 118,241.88 × 48,448.92
  4. Step 4: Simplify right side
    78,809.28x = 5,728,691,384.77
  5. Step 5: Solve for x
    x = 5,728,691,384.77/78,809.28
  6. Step 6: Final answer
    x = 72,690.57

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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.