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Finding the Fourth Proportional to 163,808.20, 245,615.10 and 85,076.20

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Solution

The fourth proportional to 163,808.20, 245,615.10 and 85,076.20 is: 127,563.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,808.20 : 245,615.10 = 85,076.20 : x
  2. Step 2: Convert to fraction form
    163,808.20/245,615.10 = 85,076.20/x
  3. Step 3: Cross multiply
    163,808.20x = 245,615.10 × 85,076.20
  4. Step 4: Simplify right side
    163,808.20x = 20,895,999,370.62
  5. Step 5: Solve for x
    x = 20,895,999,370.62/163,808.20
  6. Step 6: Final answer
    x = 127,563.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.