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Finding the Fourth Proportional to 251,182.80, 346,638.68 and 138,008.40

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Solution

The fourth proportional to 251,182.80, 346,638.68 and 138,008.40 is: 190,455.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,182.80 : 346,638.68 = 138,008.40 : x
  2. Step 2: Convert to fraction form
    251,182.80/346,638.68 = 138,008.40/x
  3. Step 3: Cross multiply
    251,182.80x = 346,638.68 × 138,008.40
  4. Step 4: Simplify right side
    251,182.80x = 47,839,049,604.91
  5. Step 5: Solve for x
    x = 47,839,049,604.91/251,182.80
  6. Step 6: Final answer
    x = 190,455.12

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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.