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Finding the Fourth Proportional to 163,613.80, 245,420.70 and 84,752.20

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Solution

The fourth proportional to 163,613.80, 245,420.70 and 84,752.20 is: 127,128.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,613.80 : 245,420.70 = 84,752.20 : x
  2. Step 2: Convert to fraction form
    163,613.80/245,420.70 = 84,752.20/x
  3. Step 3: Cross multiply
    163,613.80x = 245,420.70 × 84,752.20
  4. Step 4: Simplify right side
    163,613.80x = 20,799,944,250.54
  5. Step 5: Solve for x
    x = 20,799,944,250.54/163,613.80
  6. Step 6: Final answer
    x = 127,128.30

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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.