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Finding the Fourth Proportional to 157,610.70, 236,416.05 and 78,878.70

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Solution

The fourth proportional to 157,610.70, 236,416.05 and 78,878.70 is: 118,318.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,610.70 : 236,416.05 = 78,878.70 : x
  2. Step 2: Convert to fraction form
    157,610.70/236,416.05 = 78,878.70/x
  3. Step 3: Cross multiply
    157,610.70x = 236,416.05 × 78,878.70
  4. Step 4: Simplify right side
    157,610.70x = 18,648,190,683.14
  5. Step 5: Solve for x
    x = 18,648,190,683.14/157,610.70
  6. Step 6: Final answer
    x = 118,318.05

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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.