Home / 128,595.39-177,454.05-70,440.56

Finding the Fourth Proportional to 128,595.39, 177,454.05 and 70,440.56

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Solution

The fourth proportional to 128,595.39, 177,454.05 and 70,440.56 is: 97,203.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,595.39 : 177,454.05 = 70,440.56 : x
  2. Step 2: Convert to fraction form
    128,595.39/177,454.05 = 70,440.56/x
  3. Step 3: Cross multiply
    128,595.39x = 177,454.05 × 70,440.56
  4. Step 4: Simplify right side
    128,595.39x = 12,499,962,635.10
  5. Step 5: Solve for x
    x = 12,499,962,635.10/128,595.39
  6. Step 6: Final answer
    x = 97,203.81

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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.