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Finding the Fourth Proportional to 77,881.50, 116,657.01 and 75,153.42

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Solution

The fourth proportional to 77,881.50, 116,657.01 and 75,153.42 is: 112,570.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,881.50 : 116,657.01 = 75,153.42 : x
  2. Step 2: Convert to fraction form
    77,881.50/116,657.01 = 75,153.42/x
  3. Step 3: Cross multiply
    77,881.50x = 116,657.01 × 75,153.42
  4. Step 4: Simplify right side
    77,881.50x = 8,767,173,268.47
  5. Step 5: Solve for x
    x = 8,767,173,268.47/77,881.50
  6. Step 6: Final answer
    x = 112,570.68

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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.