Home / 128,250.43-176,986.15-70,108.34

Finding the Fourth Proportional to 128,250.43, 176,986.15 and 70,108.34

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Solution

The fourth proportional to 128,250.43, 176,986.15 and 70,108.34 is: 96,749.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,250.43 : 176,986.15 = 70,108.34 : x
  2. Step 2: Convert to fraction form
    128,250.43/176,986.15 = 70,108.34/x
  3. Step 3: Cross multiply
    128,250.43x = 176,986.15 × 70,108.34
  4. Step 4: Simplify right side
    128,250.43x = 12,408,204,119.29
  5. Step 5: Solve for x
    x = 12,408,204,119.29/128,250.43
  6. Step 6: Final answer
    x = 96,749.81

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1.5x scale

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.