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Finding the Fourth Proportional to 163,421.34, 225,515.30 and 90,828.73

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Solution

The fourth proportional to 163,421.34, 225,515.30 and 90,828.73 is: 125,340.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,421.34 : 225,515.30 = 90,828.73 : x
  2. Step 2: Convert to fraction form
    163,421.34/225,515.30 = 90,828.73/x
  3. Step 3: Cross multiply
    163,421.34x = 225,515.30 × 90,828.73
  4. Step 4: Simplify right side
    163,421.34x = 20,483,268,294.57
  5. Step 5: Solve for x
    x = 20,483,268,294.57/163,421.34
  6. Step 6: Final answer
    x = 125,340.23

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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.