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Finding the Fourth Proportional to 231,652.69, 319,686.12 and 129,675.61

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Solution

The fourth proportional to 231,652.69, 319,686.12 and 129,675.61 is: 178,955.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,652.69 : 319,686.12 = 129,675.61 : x
  2. Step 2: Convert to fraction form
    231,652.69/319,686.12 = 129,675.61/x
  3. Step 3: Cross multiply
    231,652.69x = 319,686.12 × 129,675.61
  4. Step 4: Simplify right side
    231,652.69x = 41,455,492,619.53
  5. Step 5: Solve for x
    x = 41,455,492,619.53/231,652.69
  6. Step 6: Final answer
    x = 178,955.37

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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.