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Finding the Fourth Proportional to 86,178.76, 118,898.10 and 70,235.80

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Solution

The fourth proportional to 86,178.76, 118,898.10 and 70,235.80 is: 96,902.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,178.76 : 118,898.10 = 70,235.80 : x
  2. Step 2: Convert to fraction form
    86,178.76/118,898.10 = 70,235.80/x
  3. Step 3: Cross multiply
    86,178.76x = 118,898.10 × 70,235.80
  4. Step 4: Simplify right side
    86,178.76x = 8,350,903,171.98
  5. Step 5: Solve for x
    x = 8,350,903,171.98/86,178.76
  6. Step 6: Final answer
    x = 96,902.10

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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.