Home / 138,761.14-191,493.33-78,320.18

Finding the Fourth Proportional to 138,761.14, 191,493.33 and 78,320.18

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Solution

The fourth proportional to 138,761.14, 191,493.33 and 78,320.18 is: 108,083.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,761.14 : 191,493.33 = 78,320.18 : x
  2. Step 2: Convert to fraction form
    138,761.14/191,493.33 = 78,320.18/x
  3. Step 3: Cross multiply
    138,761.14x = 191,493.33 × 78,320.18
  4. Step 4: Simplify right side
    138,761.14x = 14,997,792,074.40
  5. Step 5: Solve for x
    x = 14,997,792,074.40/138,761.14
  6. Step 6: Final answer
    x = 108,083.52

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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.