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Finding the Fourth Proportional to 65,889.72, 90,918 and 37,208.81

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Solution

The fourth proportional to 65,889.72, 90,918 and 37,208.81 is: 51,342.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,889.72 : 90,918 = 37,208.81 : x
  2. Step 2: Convert to fraction form
    65,889.72/90,918 = 37,208.81/x
  3. Step 3: Cross multiply
    65,889.72x = 90,918 × 37,208.81
  4. Step 4: Simplify right side
    65,889.72x = 3,382,950,303.46
  5. Step 5: Solve for x
    x = 3,382,950,303.46/65,889.72
  6. Step 6: Final answer
    x = 51,342.61

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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.