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Finding the Fourth Proportional to 93,140.70, 139,711.05 and 33,978.30

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Solution

The fourth proportional to 93,140.70, 139,711.05 and 33,978.30 is: 50,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,140.70 : 139,711.05 = 33,978.30 : x
  2. Step 2: Convert to fraction form
    93,140.70/139,711.05 = 33,978.30/x
  3. Step 3: Cross multiply
    93,140.70x = 139,711.05 × 33,978.30
  4. Step 4: Simplify right side
    93,140.70x = 4,747,143,970.22
  5. Step 5: Solve for x
    x = 4,747,143,970.22/93,140.70
  6. Step 6: Final answer
    x = 50,967.45

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Similar ratio
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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.