Home / 128,852.12-177,774-72,252.56

Finding the Fourth Proportional to 128,852.12, 177,774 and 72,252.56

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Solution

The fourth proportional to 128,852.12, 177,774 and 72,252.56 is: 99,685.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,852.12 : 177,774 = 72,252.56 : x
  2. Step 2: Convert to fraction form
    128,852.12/177,774 = 72,252.56/x
  3. Step 3: Cross multiply
    128,852.12x = 177,774 × 72,252.56
  4. Step 4: Simplify right side
    128,852.12x = 12,844,626,601.44
  5. Step 5: Solve for x
    x = 12,844,626,601.44/128,852.12
  6. Step 6: Final answer
    x = 99,685.02

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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.