Home / 142,743.40-214,115.10-76,388.20

Finding the Fourth Proportional to 142,743.40, 214,115.10 and 76,388.20

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Solution

The fourth proportional to 142,743.40, 214,115.10 and 76,388.20 is: 114,582.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,743.40 : 214,115.10 = 76,388.20 : x
  2. Step 2: Convert to fraction form
    142,743.40/214,115.10 = 76,388.20/x
  3. Step 3: Cross multiply
    142,743.40x = 214,115.10 × 76,388.20
  4. Step 4: Simplify right side
    142,743.40x = 16,355,867,081.82
  5. Step 5: Solve for x
    x = 16,355,867,081.82/142,743.40
  6. Step 6: Final answer
    x = 114,582.30

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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.