Home / 113,129.10-156,109.05-65,385.54

Finding the Fourth Proportional to 113,129.10, 156,109.05 and 65,385.54

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Solution

The fourth proportional to 113,129.10, 156,109.05 and 65,385.54 is: 90,226.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,129.10 : 156,109.05 = 65,385.54 : x
  2. Step 2: Convert to fraction form
    113,129.10/156,109.05 = 65,385.54/x
  3. Step 3: Cross multiply
    113,129.10x = 156,109.05 × 65,385.54
  4. Step 4: Simplify right side
    113,129.10x = 10,207,274,533.14
  5. Step 5: Solve for x
    x = 10,207,274,533.14/113,129.10
  6. Step 6: Final answer
    x = 90,226.78

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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.