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Finding the Fourth Proportional to 155,625.34, 214,760.64 and 87,642.49

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Solution

The fourth proportional to 155,625.34, 214,760.64 and 87,642.49 is: 120,945.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,625.34 : 214,760.64 = 87,642.49 : x
  2. Step 2: Convert to fraction form
    155,625.34/214,760.64 = 87,642.49/x
  3. Step 3: Cross multiply
    155,625.34x = 214,760.64 × 87,642.49
  4. Step 4: Simplify right side
    155,625.34x = 18,822,157,243.59
  5. Step 5: Solve for x
    x = 18,822,157,243.59/155,625.34
  6. Step 6: Final answer
    x = 120,945.32

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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.