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Finding the Fourth Proportional to 138,362.98, 190,875.65 and 80,966.77

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Solution

The fourth proportional to 138,362.98, 190,875.65 and 80,966.77 is: 111,695.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,362.98 : 190,875.65 = 80,966.77 : x
  2. Step 2: Convert to fraction form
    138,362.98/190,875.65 = 80,966.77/x
  3. Step 3: Cross multiply
    138,362.98x = 190,875.65 × 80,966.77
  4. Step 4: Simplify right side
    138,362.98x = 15,454,584,852.15
  5. Step 5: Solve for x
    x = 15,454,584,852.15/138,362.98
  6. Step 6: Final answer
    x = 111,695.95

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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.