Home / 130,684.78-180,408.36-87,648.57

Finding the Fourth Proportional to 130,684.78, 180,408.36 and 87,648.57

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Solution

The fourth proportional to 130,684.78, 180,408.36 and 87,648.57 is: 120,997.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,684.78 : 180,408.36 = 87,648.57 : x
  2. Step 2: Convert to fraction form
    130,684.78/180,408.36 = 87,648.57/x
  3. Step 3: Cross multiply
    130,684.78x = 180,408.36 × 87,648.57
  4. Step 4: Simplify right side
    130,684.78x = 15,812,534,770.05
  5. Step 5: Solve for x
    x = 15,812,534,770.05/130,684.78
  6. Step 6: Final answer
    x = 120,997.52

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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.