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Finding the Fourth Proportional to 65,696.78, 90,661.65 and 37,402.47

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Solution

The fourth proportional to 65,696.78, 90,661.65 and 37,402.47 is: 51,615.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,696.78 : 90,661.65 = 37,402.47 : x
  2. Step 2: Convert to fraction form
    65,696.78/90,661.65 = 37,402.47/x
  3. Step 3: Cross multiply
    65,696.78x = 90,661.65 × 37,402.47
  4. Step 4: Simplify right side
    65,696.78x = 3,390,969,504.02
  5. Step 5: Solve for x
    x = 3,390,969,504.02/65,696.78
  6. Step 6: Final answer
    x = 51,615.46

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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.