Home / 112,799.79-155,724.12-72,004.95

Finding the Fourth Proportional to 112,799.79, 155,724.12 and 72,004.95

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Solution

The fourth proportional to 112,799.79, 155,724.12 and 72,004.95 is: 99,405.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,799.79 : 155,724.12 = 72,004.95 : x
  2. Step 2: Convert to fraction form
    112,799.79/155,724.12 = 72,004.95/x
  3. Step 3: Cross multiply
    112,799.79x = 155,724.12 × 72,004.95
  4. Step 4: Simplify right side
    112,799.79x = 11,212,907,474.39
  5. Step 5: Solve for x
    x = 11,212,907,474.39/112,799.79
  6. Step 6: Final answer
    x = 99,405.39

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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.