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Finding the Fourth Proportional to 65,012.40, 89,718.30 and 36,712.80

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Solution

The fourth proportional to 65,012.40, 89,718.30 and 36,712.80 is: 50,664.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,012.40 : 89,718.30 = 36,712.80 : x
  2. Step 2: Convert to fraction form
    65,012.40/89,718.30 = 36,712.80/x
  3. Step 3: Cross multiply
    65,012.40x = 89,718.30 × 36,712.80
  4. Step 4: Simplify right side
    65,012.40x = 3,293,810,004.24
  5. Step 5: Solve for x
    x = 3,293,810,004.24/65,012.40
  6. Step 6: Final answer
    x = 50,664.33

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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.