Home / 66,108.20-91,215.07-39,259.74

Finding the Fourth Proportional to 66,108.20, 91,215.07 and 39,259.74

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Solution

The fourth proportional to 66,108.20, 91,215.07 and 39,259.74 is: 54,169.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,108.20 : 91,215.07 = 39,259.74 : x
  2. Step 2: Convert to fraction form
    66,108.20/91,215.07 = 39,259.74/x
  3. Step 3: Cross multiply
    66,108.20x = 91,215.07 × 39,259.74
  4. Step 4: Simplify right side
    66,108.20x = 3,581,079,834.13
  5. Step 5: Solve for x
    x = 3,581,079,834.13/66,108.20
  6. Step 6: Final answer
    x = 54,169.98

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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.