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Finding the Fourth Proportional to 154,473.75, 213,145.56 and 86,491.80

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Solution

The fourth proportional to 154,473.75, 213,145.56 and 86,491.80 is: 119,342.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,473.75 : 213,145.56 = 86,491.80 : x
  2. Step 2: Convert to fraction form
    154,473.75/213,145.56 = 86,491.80/x
  3. Step 3: Cross multiply
    154,473.75x = 213,145.56 × 86,491.80
  4. Step 4: Simplify right side
    154,473.75x = 18,435,343,146.41
  5. Step 5: Solve for x
    x = 18,435,343,146.41/154,473.75
  6. Step 6: Final answer
    x = 119,342.89

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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.