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Finding the Fourth Proportional to 77,668.60, 116,502.90 and 33,287.80

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Solution

The fourth proportional to 77,668.60, 116,502.90 and 33,287.80 is: 49,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,668.60 : 116,502.90 = 33,287.80 : x
  2. Step 2: Convert to fraction form
    77,668.60/116,502.90 = 33,287.80/x
  3. Step 3: Cross multiply
    77,668.60x = 116,502.90 × 33,287.80
  4. Step 4: Simplify right side
    77,668.60x = 3,878,125,234.62
  5. Step 5: Solve for x
    x = 3,878,125,234.62/77,668.60
  6. Step 6: Final answer
    x = 49,931.70

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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.