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Finding the Fourth Proportional to 67,980.48, 93,708 and 55,383.36

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Solution

The fourth proportional to 67,980.48, 93,708 and 55,383.36 is: 76,343.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,980.48 : 93,708 = 55,383.36 : x
  2. Step 2: Convert to fraction form
    67,980.48/93,708 = 55,383.36/x
  3. Step 3: Cross multiply
    67,980.48x = 93,708 × 55,383.36
  4. Step 4: Simplify right side
    67,980.48x = 5,189,863,898.88
  5. Step 5: Solve for x
    x = 5,189,863,898.88/67,980.48
  6. Step 6: Final answer
    x = 76,343.44

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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.