Home / 128,082.76-176,753.40-70,725.66

Finding the Fourth Proportional to 128,082.76, 176,753.40 and 70,725.66

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Solution

The fourth proportional to 128,082.76, 176,753.40 and 70,725.66 is: 97,600.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,082.76 : 176,753.40 = 70,725.66 : x
  2. Step 2: Convert to fraction form
    128,082.76/176,753.40 = 70,725.66/x
  3. Step 3: Cross multiply
    128,082.76x = 176,753.40 × 70,725.66
  4. Step 4: Simplify right side
    128,082.76x = 12,501,000,872.24
  5. Step 5: Solve for x
    x = 12,501,000,872.24/128,082.76
  6. Step 6: Final answer
    x = 97,600.96

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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.