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Finding the Fourth Proportional to 125,348.88, 172,883.70 and 77,628.72

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Solution

The fourth proportional to 125,348.88, 172,883.70 and 77,628.72 is: 107,067.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,348.88 : 172,883.70 = 77,628.72 : x
  2. Step 2: Convert to fraction form
    125,348.88/172,883.70 = 77,628.72/x
  3. Step 3: Cross multiply
    125,348.88x = 172,883.70 × 77,628.72
  4. Step 4: Simplify right side
    125,348.88x = 13,420,740,339.86
  5. Step 5: Solve for x
    x = 13,420,740,339.86/125,348.88
  6. Step 6: Final answer
    x = 107,067.09

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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.