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Finding the Fourth Proportional to 79,223.40, 118,899.90 and 76,631.40

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Solution

The fourth proportional to 79,223.40, 118,899.90 and 76,631.40 is: 115,009.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,223.40 : 118,899.90 = 76,631.40 : x
  2. Step 2: Convert to fraction form
    79,223.40/118,899.90 = 76,631.40/x
  3. Step 3: Cross multiply
    79,223.40x = 118,899.90 × 76,631.40
  4. Step 4: Simplify right side
    79,223.40x = 9,111,465,796.86
  5. Step 5: Solve for x
    x = 9,111,465,796.86/79,223.40
  6. Step 6: Final answer
    x = 115,009.78

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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.