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Finding the Fourth Proportional to 231,630.59, 319,655.63 and 129,653.52

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Solution

The fourth proportional to 231,630.59, 319,655.63 and 129,653.52 is: 178,924.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,630.59 : 319,655.63 = 129,653.52 : x
  2. Step 2: Convert to fraction form
    231,630.59/319,655.63 = 129,653.52/x
  3. Step 3: Cross multiply
    231,630.59x = 319,655.63 × 129,653.52
  4. Step 4: Simplify right side
    231,630.59x = 41,444,477,617.32
  5. Step 5: Solve for x
    x = 41,444,477,617.32/231,630.59
  6. Step 6: Final answer
    x = 178,924.89

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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.