Home / 128,372.42-177,140.30-71,002.62

Finding the Fourth Proportional to 128,372.42, 177,140.30 and 71,002.62

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Solution

The fourth proportional to 128,372.42, 177,140.30 and 71,002.62 is: 97,976.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,372.42 : 177,140.30 = 71,002.62 : x
  2. Step 2: Convert to fraction form
    128,372.42/177,140.30 = 71,002.62/x
  3. Step 3: Cross multiply
    128,372.42x = 177,140.30 × 71,002.62
  4. Step 4: Simplify right side
    128,372.42x = 12,577,425,407.59
  5. Step 5: Solve for x
    x = 12,577,425,407.59/128,372.42
  6. Step 6: Final answer
    x = 97,976.07

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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.