Home / 147,839.10-221,430.60-128,156.10

Finding the Fourth Proportional to 147,839.10, 221,430.60 and 128,156.10

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Solution

The fourth proportional to 147,839.10, 221,430.60 and 128,156.10 is: 191,949.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,839.10 : 221,430.60 = 128,156.10 : x
  2. Step 2: Convert to fraction form
    147,839.10/221,430.60 = 128,156.10/x
  3. Step 3: Cross multiply
    147,839.10x = 221,430.60 × 128,156.10
  4. Step 4: Simplify right side
    147,839.10x = 28,377,682,116.66
  5. Step 5: Solve for x
    x = 28,377,682,116.66/147,839.10
  6. Step 6: Final answer
    x = 191,949.78

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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.