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Finding the Fourth Proportional to 163,419.10, 225,493.80 and 91,785.40

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Solution

The fourth proportional to 163,419.10, 225,493.80 and 91,785.40 is: 126,650.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,419.10 : 225,493.80 = 91,785.40 : x
  2. Step 2: Convert to fraction form
    163,419.10/225,493.80 = 91,785.40/x
  3. Step 3: Cross multiply
    163,419.10x = 225,493.80 × 91,785.40
  4. Step 4: Simplify right side
    163,419.10x = 20,697,038,630.52
  5. Step 5: Solve for x
    x = 20,697,038,630.52/163,419.10
  6. Step 6: Final answer
    x = 126,650.06

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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.