Home / 128,512.17-177,347.34-71,923.50

Finding the Fourth Proportional to 128,512.17, 177,347.34 and 71,923.50

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Solution

The fourth proportional to 128,512.17, 177,347.34 and 71,923.50 is: 99,254.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,512.17 : 177,347.34 = 71,923.50 : x
  2. Step 2: Convert to fraction form
    128,512.17/177,347.34 = 71,923.50/x
  3. Step 3: Cross multiply
    128,512.17x = 177,347.34 × 71,923.50
  4. Step 4: Simplify right side
    128,512.17x = 12,755,441,408.49
  5. Step 5: Solve for x
    x = 12,755,441,408.49/128,512.17
  6. Step 6: Final answer
    x = 99,254.74

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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.