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Finding the Fourth Proportional to 79,235.80, 118,853.70 and 51,242.20

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Solution

The fourth proportional to 79,235.80, 118,853.70 and 51,242.20 is: 76,863.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,235.80 : 118,853.70 = 51,242.20 : x
  2. Step 2: Convert to fraction form
    79,235.80/118,853.70 = 51,242.20/x
  3. Step 3: Cross multiply
    79,235.80x = 118,853.70 × 51,242.20
  4. Step 4: Simplify right side
    79,235.80x = 6,090,325,066.14
  5. Step 5: Solve for x
    x = 6,090,325,066.14/79,235.80
  6. Step 6: Final answer
    x = 76,863.30

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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.