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Finding the Fourth Proportional to 76,190.40, 114,026.40 and 66,859.20

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Solution

The fourth proportional to 76,190.40, 114,026.40 and 66,859.20 is: 100,061.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,190.40 : 114,026.40 = 66,859.20 : x
  2. Step 2: Convert to fraction form
    76,190.40/114,026.40 = 66,859.20/x
  3. Step 3: Cross multiply
    76,190.40x = 114,026.40 × 66,859.20
  4. Step 4: Simplify right side
    76,190.40x = 7,623,713,882.88
  5. Step 5: Solve for x
    x = 7,623,713,882.88/76,190.40
  6. Step 6: Final answer
    x = 100,061.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.