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Finding the Fourth Proportional to 163,420.64, 225,512.88 and 90,820.16

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Solution

The fourth proportional to 163,420.64, 225,512.88 and 90,820.16 is: 125,327.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,420.64 : 225,512.88 = 90,820.16 : x
  2. Step 2: Convert to fraction form
    163,420.64/225,512.88 = 90,820.16/x
  3. Step 3: Cross multiply
    163,420.64x = 225,512.88 × 90,820.16
  4. Step 4: Simplify right side
    163,420.64x = 20,481,115,843.66
  5. Step 5: Solve for x
    x = 20,481,115,843.66/163,420.64
  6. Step 6: Final answer
    x = 125,327.60

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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.