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Finding the Fourth Proportional to 65,740.81, 90,725 and 37,061.56

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Solution

The fourth proportional to 65,740.81, 90,725 and 37,061.56 is: 51,146.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,740.81 : 90,725 = 37,061.56 : x
  2. Step 2: Convert to fraction form
    65,740.81/90,725 = 37,061.56/x
  3. Step 3: Cross multiply
    65,740.81x = 90,725 × 37,061.56
  4. Step 4: Simplify right side
    65,740.81x = 3,362,410,031
  5. Step 5: Solve for x
    x = 3,362,410,031/65,740.81
  6. Step 6: Final answer
    x = 51,146.46

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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.