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Finding the Fourth Proportional to 65,011.68, 89,722.49 and 39,515.82

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Solution

The fourth proportional to 65,011.68, 89,722.49 and 39,515.82 is: 54,535.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,011.68 : 89,722.49 = 39,515.82 : x
  2. Step 2: Convert to fraction form
    65,011.68/89,722.49 = 39,515.82/x
  3. Step 3: Cross multiply
    65,011.68x = 89,722.49 × 39,515.82
  4. Step 4: Simplify right side
    65,011.68x = 3,545,457,230.75
  5. Step 5: Solve for x
    x = 3,545,457,230.75/65,011.68
  6. Step 6: Final answer
    x = 54,535.70

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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.