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Finding the Fourth Proportional to 82,430.40, 123,645.60 and 79,204.80

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Solution

The fourth proportional to 82,430.40, 123,645.60 and 79,204.80 is: 118,807.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,430.40 : 123,645.60 = 79,204.80 : x
  2. Step 2: Convert to fraction form
    82,430.40/123,645.60 = 79,204.80/x
  3. Step 3: Cross multiply
    82,430.40x = 123,645.60 × 79,204.80
  4. Step 4: Simplify right side
    82,430.40x = 9,793,325,018.88
  5. Step 5: Solve for x
    x = 9,793,325,018.88/82,430.40
  6. Step 6: Final answer
    x = 118,807.20

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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.