Home / 128,973.17-177,983.34-71,612.61

Finding the Fourth Proportional to 128,973.17, 177,983.34 and 71,612.61

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Solution

The fourth proportional to 128,973.17, 177,983.34 and 71,612.61 is: 98,825.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,973.17 : 177,983.34 = 71,612.61 : x
  2. Step 2: Convert to fraction form
    128,973.17/177,983.34 = 71,612.61/x
  3. Step 3: Cross multiply
    128,973.17x = 177,983.34 × 71,612.61
  4. Step 4: Simplify right side
    128,973.17x = 12,745,851,513.92
  5. Step 5: Solve for x
    x = 12,745,851,513.92/128,973.17
  6. Step 6: Final answer
    x = 98,825.61

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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.