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Finding the Fourth Proportional to 85,668.60, 118,220.13 and 47,429.85

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Solution

The fourth proportional to 85,668.60, 118,220.13 and 47,429.85 is: 65,451.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,668.60 : 118,220.13 = 47,429.85 : x
  2. Step 2: Convert to fraction form
    85,668.60/118,220.13 = 47,429.85/x
  3. Step 3: Cross multiply
    85,668.60x = 118,220.13 × 47,429.85
  4. Step 4: Simplify right side
    85,668.60x = 5,607,163,032.88
  5. Step 5: Solve for x
    x = 5,607,163,032.88/85,668.60
  6. Step 6: Final answer
    x = 65,451.79

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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.