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Finding the Fourth Proportional to 235,549.90, 324,944.40 and 139,988.98

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Solution

The fourth proportional to 235,549.90, 324,944.40 and 139,988.98 is: 193,116.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,549.90 : 324,944.40 = 139,988.98 : x
  2. Step 2: Convert to fraction form
    235,549.90/324,944.40 = 139,988.98/x
  3. Step 3: Cross multiply
    235,549.90x = 324,944.40 × 139,988.98
  4. Step 4: Simplify right side
    235,549.90x = 45,488,635,112.71
  5. Step 5: Solve for x
    x = 45,488,635,112.71/235,549.90
  6. Step 6: Final answer
    x = 193,116.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.