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Finding the Fourth Proportional to 231,630.72, 319,655.80 and 129,653.64

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Solution

The fourth proportional to 231,630.72, 319,655.80 and 129,653.64 is: 178,925.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,630.72 : 319,655.80 = 129,653.64 : x
  2. Step 2: Convert to fraction form
    231,630.72/319,655.80 = 129,653.64/x
  3. Step 3: Cross multiply
    231,630.72x = 319,655.80 × 129,653.64
  4. Step 4: Simplify right side
    231,630.72x = 41,444,538,179.18
  5. Step 5: Solve for x
    x = 41,444,538,179.18/231,630.72
  6. Step 6: Final answer
    x = 178,925.05

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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.