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Finding the Fourth Proportional to 100,131.60, 149,905.80 and 60,668.40

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Solution

The fourth proportional to 100,131.60, 149,905.80 and 60,668.40 is: 90,825.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,131.60 : 149,905.80 = 60,668.40 : x
  2. Step 2: Convert to fraction form
    100,131.60/149,905.80 = 60,668.40/x
  3. Step 3: Cross multiply
    100,131.60x = 149,905.80 × 60,668.40
  4. Step 4: Simplify right side
    100,131.60x = 9,094,545,036.72
  5. Step 5: Solve for x
    x = 9,094,545,036.72/100,131.60
  6. Step 6: Final answer
    x = 90,825.92

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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.