Home / 129,018.56-193,113.12-87,235.52

Finding the Fourth Proportional to 129,018.56, 193,113.12 and 87,235.52

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Solution

The fourth proportional to 129,018.56, 193,113.12 and 87,235.52 is: 130,572.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,018.56 : 193,113.12 = 87,235.52 : x
  2. Step 2: Convert to fraction form
    129,018.56/193,113.12 = 87,235.52/x
  3. Step 3: Cross multiply
    129,018.56x = 193,113.12 × 87,235.52
  4. Step 4: Simplify right side
    129,018.56x = 16,846,323,442.02
  5. Step 5: Solve for x
    x = 16,846,323,442.02/129,018.56
  6. Step 6: Final answer
    x = 130,572.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.