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Finding the Fourth Proportional to 147,649.20, 220,890.60 and 128,144.40

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Solution

The fourth proportional to 147,649.20, 220,890.60 and 128,144.40 is: 191,710.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,649.20 : 220,890.60 = 128,144.40 : x
  2. Step 2: Convert to fraction form
    147,649.20/220,890.60 = 128,144.40/x
  3. Step 3: Cross multiply
    147,649.20x = 220,890.60 × 128,144.40
  4. Step 4: Simplify right side
    147,649.20x = 28,305,893,402.64
  5. Step 5: Solve for x
    x = 28,305,893,402.64/147,649.20
  6. Step 6: Final answer
    x = 191,710.44

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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.