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Finding the Fourth Proportional to 76,422.40, 114,633.60 and 72,048.40

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Solution

The fourth proportional to 76,422.40, 114,633.60 and 72,048.40 is: 108,072.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,422.40 : 114,633.60 = 72,048.40 : x
  2. Step 2: Convert to fraction form
    76,422.40/114,633.60 = 72,048.40/x
  3. Step 3: Cross multiply
    76,422.40x = 114,633.60 × 72,048.40
  4. Step 4: Simplify right side
    76,422.40x = 8,259,167,466.24
  5. Step 5: Solve for x
    x = 8,259,167,466.24/76,422.40
  6. Step 6: Final answer
    x = 108,072.60

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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.