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Finding the Fourth Proportional to 163,638.80, 245,458.20 and 84,777.20

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Solution

The fourth proportional to 163,638.80, 245,458.20 and 84,777.20 is: 127,165.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,638.80 : 245,458.20 = 84,777.20 : x
  2. Step 2: Convert to fraction form
    163,638.80/245,458.20 = 84,777.20/x
  3. Step 3: Cross multiply
    163,638.80x = 245,458.20 × 84,777.20
  4. Step 4: Simplify right side
    163,638.80x = 20,809,258,913.04
  5. Step 5: Solve for x
    x = 20,809,258,913.04/163,638.80
  6. Step 6: Final answer
    x = 127,165.80

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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.