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Finding the Fourth Proportional to 155,627.48, 214,742.22 and 87,640.88

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Solution

The fourth proportional to 155,627.48, 214,742.22 and 87,640.88 is: 120,931.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,627.48 : 214,742.22 = 87,640.88 : x
  2. Step 2: Convert to fraction form
    155,627.48/214,742.22 = 87,640.88/x
  3. Step 3: Cross multiply
    155,627.48x = 214,742.22 × 87,640.88
  4. Step 4: Simplify right side
    155,627.48x = 18,820,197,133.95
  5. Step 5: Solve for x
    x = 18,820,197,133.95/155,627.48
  6. Step 6: Final answer
    x = 120,931.07

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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.