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Finding the Fourth Proportional to 142,101.30, 213,042.60 and 79,771.80

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Solution

The fourth proportional to 142,101.30, 213,042.60 and 79,771.80 is: 119,596.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,101.30 : 213,042.60 = 79,771.80 : x
  2. Step 2: Convert to fraction form
    142,101.30/213,042.60 = 79,771.80/x
  3. Step 3: Cross multiply
    142,101.30x = 213,042.60 × 79,771.80
  4. Step 4: Simplify right side
    142,101.30x = 16,994,791,678.68
  5. Step 5: Solve for x
    x = 16,994,791,678.68/142,101.30
  6. Step 6: Final answer
    x = 119,596.31

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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.