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Finding the Fourth Proportional to 215,007.60, 322,657.20 and 139,944.90

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Solution

The fourth proportional to 215,007.60, 322,657.20 and 139,944.90 is: 210,012.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,007.60 : 322,657.20 = 139,944.90 : x
  2. Step 2: Convert to fraction form
    215,007.60/322,657.20 = 139,944.90/x
  3. Step 3: Cross multiply
    215,007.60x = 322,657.20 × 139,944.90
  4. Step 4: Simplify right side
    215,007.60x = 45,154,229,588.28
  5. Step 5: Solve for x
    x = 45,154,229,588.28/215,007.60
  6. Step 6: Final answer
    x = 210,012.25

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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.