Home / 128,847.17-177,756.60-86,419.37

Finding the Fourth Proportional to 128,847.17, 177,756.60 and 86,419.37

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Solution

The fourth proportional to 128,847.17, 177,756.60 and 86,419.37 is: 119,223.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,847.17 : 177,756.60 = 86,419.37 : x
  2. Step 2: Convert to fraction form
    128,847.17/177,756.60 = 86,419.37/x
  3. Step 3: Cross multiply
    128,847.17x = 177,756.60 × 86,419.37
  4. Step 4: Simplify right side
    128,847.17x = 15,361,613,385.34
  5. Step 5: Solve for x
    x = 15,361,613,385.34/128,847.17
  6. Step 6: Final answer
    x = 119,223.52

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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.