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Finding the Fourth Proportional to 65,859.40, 90,861.51 and 41,980.60

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Solution

The fourth proportional to 65,859.40, 90,861.51 and 41,980.60 is: 57,917.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,859.40 : 90,861.51 = 41,980.60 : x
  2. Step 2: Convert to fraction form
    65,859.40/90,861.51 = 41,980.60/x
  3. Step 3: Cross multiply
    65,859.40x = 90,861.51 × 41,980.60
  4. Step 4: Simplify right side
    65,859.40x = 3,814,420,706.71
  5. Step 5: Solve for x
    x = 3,814,420,706.71/65,859.40
  6. Step 6: Final answer
    x = 57,917.64

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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.