Home / 65,768.36-90,769.02-38,908.76

Finding the Fourth Proportional to 65,768.36, 90,769.02 and 38,908.76

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Solution

The fourth proportional to 65,768.36, 90,769.02 and 38,908.76 is: 53,699.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,768.36 : 90,769.02 = 38,908.76 : x
  2. Step 2: Convert to fraction form
    65,768.36/90,769.02 = 38,908.76/x
  3. Step 3: Cross multiply
    65,768.36x = 90,769.02 × 38,908.76
  4. Step 4: Simplify right side
    65,768.36x = 3,531,710,014.62
  5. Step 5: Solve for x
    x = 3,531,710,014.62/65,768.36
  6. Step 6: Final answer
    x = 53,699.23

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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.