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Finding the Fourth Proportional to 65,720.30, 90,693.91 and 37,426

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Solution

The fourth proportional to 65,720.30, 90,693.91 and 37,426 is: 51,647.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.30 : 90,693.91 = 37,426 : x
  2. Step 2: Convert to fraction form
    65,720.30/90,693.91 = 37,426/x
  3. Step 3: Cross multiply
    65,720.30x = 90,693.91 × 37,426
  4. Step 4: Simplify right side
    65,720.30x = 3,394,310,275.66
  5. Step 5: Solve for x
    x = 3,394,310,275.66/65,720.30
  6. Step 6: Final answer
    x = 51,647.82

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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.