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Finding the Fourth Proportional to 90,707.88, 125,190.71 and 65,298.35

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Solution

The fourth proportional to 90,707.88, 125,190.71 and 65,298.35 is: 90,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,707.88 : 125,190.71 = 65,298.35 : x
  2. Step 2: Convert to fraction form
    90,707.88/125,190.71 = 65,298.35/x
  3. Step 3: Cross multiply
    90,707.88x = 125,190.71 × 65,298.35
  4. Step 4: Simplify right side
    90,707.88x = 8,174,747,396.99
  5. Step 5: Solve for x
    x = 8,174,747,396.99/90,707.88
  6. Step 6: Final answer
    x = 90,121.69

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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.