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Finding the Fourth Proportional to 231,392.94, 319,307.64 and 129,427.74

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Solution

The fourth proportional to 231,392.94, 319,307.64 and 129,427.74 is: 178,602.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,392.94 : 319,307.64 = 129,427.74 : x
  2. Step 2: Convert to fraction form
    231,392.94/319,307.64 = 129,427.74/x
  3. Step 3: Cross multiply
    231,392.94x = 319,307.64 × 129,427.74
  4. Step 4: Simplify right side
    231,392.94x = 41,327,266,209.93
  5. Step 5: Solve for x
    x = 41,327,266,209.93/231,392.94
  6. Step 6: Final answer
    x = 178,602.11

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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.