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Finding the Fourth Proportional to 128,000.79, 191,984.31 and 38,041.58

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Solution

The fourth proportional to 128,000.79, 191,984.31 and 38,041.58 is: 57,057.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,000.79 : 191,984.31 = 38,041.58 : x
  2. Step 2: Convert to fraction form
    128,000.79/191,984.31 = 38,041.58/x
  3. Step 3: Cross multiply
    128,000.79x = 191,984.31 × 38,041.58
  4. Step 4: Simplify right side
    128,000.79x = 7,303,386,967.57
  5. Step 5: Solve for x
    x = 7,303,386,967.57/128,000.79
  6. Step 6: Final answer
    x = 57,057.36

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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.