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Finding the Fourth Proportional to 251,336.96, 346,836.21 and 138,158.90

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Solution

The fourth proportional to 251,336.96, 346,836.21 and 138,158.90 is: 190,654.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,336.96 : 346,836.21 = 138,158.90 : x
  2. Step 2: Convert to fraction form
    251,336.96/346,836.21 = 138,158.90/x
  3. Step 3: Cross multiply
    251,336.96x = 346,836.21 × 138,158.90
  4. Step 4: Simplify right side
    251,336.96x = 47,918,509,253.77
  5. Step 5: Solve for x
    x = 47,918,509,253.77/251,336.96
  6. Step 6: Final answer
    x = 190,654.45

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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.