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Finding the Fourth Proportional to 85,987.84, 118,662.60 and 47,747.20

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Solution

The fourth proportional to 85,987.84, 118,662.60 and 47,747.20 is: 65,890.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,987.84 : 118,662.60 = 47,747.20 : x
  2. Step 2: Convert to fraction form
    85,987.84/118,662.60 = 47,747.20/x
  3. Step 3: Cross multiply
    85,987.84x = 118,662.60 × 47,747.20
  4. Step 4: Simplify right side
    85,987.84x = 5,665,806,894.72
  5. Step 5: Solve for x
    x = 5,665,806,894.72/85,987.84
  6. Step 6: Final answer
    x = 65,890.79

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1.5x scale

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.