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Finding the Fourth Proportional to 139,055.53, 191,898.11 and 81,697.24

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Solution

The fourth proportional to 139,055.53, 191,898.11 and 81,697.24 is: 112,743.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,055.53 : 191,898.11 = 81,697.24 : x
  2. Step 2: Convert to fraction form
    139,055.53/191,898.11 = 81,697.24/x
  3. Step 3: Cross multiply
    139,055.53x = 191,898.11 × 81,697.24
  4. Step 4: Simplify right side
    139,055.53x = 15,677,545,948.22
  5. Step 5: Solve for x
    x = 15,677,545,948.22/139,055.53
  6. Step 6: Final answer
    x = 112,743.06

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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.