Home / 138,829.80-191,603.03-78,415.95

Finding the Fourth Proportional to 138,829.80, 191,603.03 and 78,415.95

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Solution

The fourth proportional to 138,829.80, 191,603.03 and 78,415.95 is: 108,224.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,829.80 : 191,603.03 = 78,415.95 : x
  2. Step 2: Convert to fraction form
    138,829.80/191,603.03 = 78,415.95/x
  3. Step 3: Cross multiply
    138,829.80x = 191,603.03 × 78,415.95
  4. Step 4: Simplify right side
    138,829.80x = 15,024,733,228.25
  5. Step 5: Solve for x
    x = 15,024,733,228.25/138,829.80
  6. Step 6: Final answer
    x = 108,224.12

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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.