Home / 128,695.69-177,539.98-80,975.35

Finding the Fourth Proportional to 128,695.69, 177,539.98 and 80,975.35

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Solution

The fourth proportional to 128,695.69, 177,539.98 and 80,975.35 is: 111,708.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,695.69 : 177,539.98 = 80,975.35 : x
  2. Step 2: Convert to fraction form
    128,695.69/177,539.98 = 80,975.35/x
  3. Step 3: Cross multiply
    128,695.69x = 177,539.98 × 80,975.35
  4. Step 4: Simplify right side
    128,695.69x = 14,376,360,964.40
  5. Step 5: Solve for x
    x = 14,376,360,964.40/128,695.69
  6. Step 6: Final answer
    x = 111,708.18

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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.