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Finding the Fourth Proportional to 231,216.40, 346,852.40 and 81,425.74

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Solution

The fourth proportional to 231,216.40, 346,852.40 and 81,425.74 is: 122,148.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,216.40 : 346,852.40 = 81,425.74 : x
  2. Step 2: Convert to fraction form
    231,216.40/346,852.40 = 81,425.74/x
  3. Step 3: Cross multiply
    231,216.40x = 346,852.40 × 81,425.74
  4. Step 4: Simplify right side
    231,216.40x = 28,242,713,340.78
  5. Step 5: Solve for x
    x = 28,242,713,340.78/231,216.40
  6. Step 6: Final answer
    x = 122,148.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.