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Finding the Fourth Proportional to 231,365.61, 319,300.80 and 129,400.56

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Solution

The fourth proportional to 231,365.61, 319,300.80 and 129,400.56 is: 178,581.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,365.61 : 319,300.80 = 129,400.56 : x
  2. Step 2: Convert to fraction form
    231,365.61/319,300.80 = 129,400.56/x
  3. Step 3: Cross multiply
    231,365.61x = 319,300.80 × 129,400.56
  4. Step 4: Simplify right side
    231,365.61x = 41,317,702,328.45
  5. Step 5: Solve for x
    x = 41,317,702,328.45/231,365.61
  6. Step 6: Final answer
    x = 178,581.87

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1.5x scale

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.