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Finding the Fourth Proportional to 125,942.78, 173,807.47 and 71,498.77

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Solution

The fourth proportional to 125,942.78, 173,807.47 and 71,498.77 is: 98,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,942.78 : 173,807.47 = 71,498.77 : x
  2. Step 2: Convert to fraction form
    125,942.78/173,807.47 = 71,498.77/x
  3. Step 3: Cross multiply
    125,942.78x = 173,807.47 × 71,498.77
  4. Step 4: Simplify right side
    125,942.78x = 12,427,019,976.67
  5. Step 5: Solve for x
    x = 12,427,019,976.67/125,942.78
  6. Step 6: Final answer
    x = 98,671.95

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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.