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Finding the Fourth Proportional to 76,622.40, 114,674.40 and 67,291.20

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Solution

The fourth proportional to 76,622.40, 114,674.40 and 67,291.20 is: 100,709.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,622.40 : 114,674.40 = 67,291.20 : x
  2. Step 2: Convert to fraction form
    76,622.40/114,674.40 = 67,291.20/x
  3. Step 3: Cross multiply
    76,622.40x = 114,674.40 × 67,291.20
  4. Step 4: Simplify right side
    76,622.40x = 7,716,577,985.28
  5. Step 5: Solve for x
    x = 7,716,577,985.28/76,622.40
  6. Step 6: Final answer
    x = 100,709.17

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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.