Home / 128,134.08-176,778.18-80,370

Finding the Fourth Proportional to 128,134.08, 176,778.18 and 80,370

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Solution

The fourth proportional to 128,134.08, 176,778.18 and 80,370 is: 110,881.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,134.08 : 176,778.18 = 80,370 : x
  2. Step 2: Convert to fraction form
    128,134.08/176,778.18 = 80,370/x
  3. Step 3: Cross multiply
    128,134.08x = 176,778.18 × 80,370
  4. Step 4: Simplify right side
    128,134.08x = 14,207,662,326.60
  5. Step 5: Solve for x
    x = 14,207,662,326.60/128,134.08
  6. Step 6: Final answer
    x = 110,881.21

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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.