Home / 113,453.20-156,781.32-85,109.68

Finding the Fourth Proportional to 113,453.20, 156,781.32 and 85,109.68

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Solution

The fourth proportional to 113,453.20, 156,781.32 and 85,109.68 is: 117,613.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,453.20 : 156,781.32 = 85,109.68 : x
  2. Step 2: Convert to fraction form
    113,453.20/156,781.32 = 85,109.68/x
  3. Step 3: Cross multiply
    113,453.20x = 156,781.32 × 85,109.68
  4. Step 4: Simplify right side
    113,453.20x = 13,343,607,975.18
  5. Step 5: Solve for x
    x = 13,343,607,975.18/113,453.20
  6. Step 6: Final answer
    x = 117,613.32

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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.