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Finding the Fourth Proportional to 160,211.40, 240,029.10 and 76,921.80

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Solution

The fourth proportional to 160,211.40, 240,029.10 and 76,921.80 is: 115,244.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,211.40 : 240,029.10 = 76,921.80 : x
  2. Step 2: Convert to fraction form
    160,211.40/240,029.10 = 76,921.80/x
  3. Step 3: Cross multiply
    160,211.40x = 240,029.10 × 76,921.80
  4. Step 4: Simplify right side
    160,211.40x = 18,463,470,424.38
  5. Step 5: Solve for x
    x = 18,463,470,424.38/160,211.40
  6. Step 6: Final answer
    x = 115,244.42

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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.