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Finding the Fourth Proportional to 147,649.80, 221,328.90 and 72,708.60

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Solution

The fourth proportional to 147,649.80, 221,328.90 and 72,708.60 is: 108,991.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,649.80 : 221,328.90 = 72,708.60 : x
  2. Step 2: Convert to fraction form
    147,649.80/221,328.90 = 72,708.60/x
  3. Step 3: Cross multiply
    147,649.80x = 221,328.90 × 72,708.60
  4. Step 4: Simplify right side
    147,649.80x = 16,092,514,458.54
  5. Step 5: Solve for x
    x = 16,092,514,458.54/147,649.80
  6. Step 6: Final answer
    x = 108,991.10

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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.