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Finding the Fourth Proportional to 125,386.70, 188,110.43 and 72,112.77

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Solution

The fourth proportional to 125,386.70, 188,110.43 and 72,112.77 is: 108,186.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,386.70 : 188,110.43 = 72,112.77 : x
  2. Step 2: Convert to fraction form
    125,386.70/188,110.43 = 72,112.77/x
  3. Step 3: Cross multiply
    125,386.70x = 188,110.43 × 72,112.77
  4. Step 4: Simplify right side
    125,386.70x = 13,565,163,812.63
  5. Step 5: Solve for x
    x = 13,565,163,812.63/125,386.70
  6. Step 6: Final answer
    x = 108,186.63

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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.