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Finding the Fourth Proportional to 65,921.88, 90,988.47 and 37,643.97

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Solution

The fourth proportional to 65,921.88, 90,988.47 and 37,643.97 is: 51,957.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,921.88 : 90,988.47 = 37,643.97 : x
  2. Step 2: Convert to fraction form
    65,921.88/90,988.47 = 37,643.97/x
  3. Step 3: Cross multiply
    65,921.88x = 90,988.47 × 37,643.97
  4. Step 4: Simplify right side
    65,921.88x = 3,425,167,235.03
  5. Step 5: Solve for x
    x = 3,425,167,235.03/65,921.88
  6. Step 6: Final answer
    x = 51,957.97

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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.