Home / 113,289.84-156,109.62-87,640.44

Finding the Fourth Proportional to 113,289.84, 156,109.62 and 87,640.44

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Solution

The fourth proportional to 113,289.84, 156,109.62 and 87,640.44 is: 120,765.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,289.84 : 156,109.62 = 87,640.44 : x
  2. Step 2: Convert to fraction form
    113,289.84/156,109.62 = 87,640.44/x
  3. Step 3: Cross multiply
    113,289.84x = 156,109.62 × 87,640.44
  4. Step 4: Simplify right side
    113,289.84x = 13,681,515,785.03
  5. Step 5: Solve for x
    x = 13,681,515,785.03/113,289.84
  6. Step 6: Final answer
    x = 120,765.60

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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.