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Finding the Fourth Proportional to 57,136.38, 78,848.20 and 34,780.38

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Solution

The fourth proportional to 57,136.38, 78,848.20 and 34,780.38 is: 47,996.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,136.38 : 78,848.20 = 34,780.38 : x
  2. Step 2: Convert to fraction form
    57,136.38/78,848.20 = 34,780.38/x
  3. Step 3: Cross multiply
    57,136.38x = 78,848.20 × 34,780.38
  4. Step 4: Simplify right side
    57,136.38x = 2,742,370,358.32
  5. Step 5: Solve for x
    x = 2,742,370,358.32/57,136.38
  6. Step 6: Final answer
    x = 47,996.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.