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Finding the Fourth Proportional to 98,628.80, 147,943.20 and 43,332.80

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Solution

The fourth proportional to 98,628.80, 147,943.20 and 43,332.80 is: 64,999.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,628.80 : 147,943.20 = 43,332.80 : x
  2. Step 2: Convert to fraction form
    98,628.80/147,943.20 = 43,332.80/x
  3. Step 3: Cross multiply
    98,628.80x = 147,943.20 × 43,332.80
  4. Step 4: Simplify right side
    98,628.80x = 6,410,793,096.96
  5. Step 5: Solve for x
    x = 6,410,793,096.96/98,628.80
  6. Step 6: Final answer
    x = 64,999.20

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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.