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Finding the Fourth Proportional to 163,421.64, 225,514.26 and 90,821.16

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Solution

The fourth proportional to 163,421.64, 225,514.26 and 90,821.16 is: 125,328.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,421.64 : 225,514.26 = 90,821.16 : x
  2. Step 2: Convert to fraction form
    163,421.64/225,514.26 = 90,821.16/x
  3. Step 3: Cross multiply
    163,421.64x = 225,514.26 × 90,821.16
  4. Step 4: Simplify right side
    163,421.64x = 20,481,466,689.74
  5. Step 5: Solve for x
    x = 20,481,466,689.74/163,421.64
  6. Step 6: Final answer
    x = 125,328.98

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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.