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Finding the Fourth Proportional to 70,533.80, 105,800.70 and 61,317.80

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Solution

The fourth proportional to 70,533.80, 105,800.70 and 61,317.80 is: 91,976.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,533.80 : 105,800.70 = 61,317.80 : x
  2. Step 2: Convert to fraction form
    70,533.80/105,800.70 = 61,317.80/x
  3. Step 3: Cross multiply
    70,533.80x = 105,800.70 × 61,317.80
  4. Step 4: Simplify right side
    70,533.80x = 6,487,466,162.46
  5. Step 5: Solve for x
    x = 6,487,466,162.46/70,533.80
  6. Step 6: Final answer
    x = 91,976.70

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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.