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Finding the Fourth Proportional to 65,728.91, 90,705.90 and 37,437.23

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Solution

The fourth proportional to 65,728.91, 90,705.90 and 37,437.23 is: 51,663.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,728.91 : 90,705.90 = 37,437.23 : x
  2. Step 2: Convert to fraction form
    65,728.91/90,705.90 = 37,437.23/x
  3. Step 3: Cross multiply
    65,728.91x = 90,705.90 × 37,437.23
  4. Step 4: Simplify right side
    65,728.91x = 3,395,777,640.66
  5. Step 5: Solve for x
    x = 3,395,777,640.66/65,728.91
  6. Step 6: Final answer
    x = 51,663.38

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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.