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Finding the Fourth Proportional to 189,403.32, 261,361.71 and 112,916.64

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Solution

The fourth proportional to 189,403.32, 261,361.71 and 112,916.64 is: 155,816.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,403.32 : 261,361.71 = 112,916.64 : x
  2. Step 2: Convert to fraction form
    189,403.32/261,361.71 = 112,916.64/x
  3. Step 3: Cross multiply
    189,403.32x = 261,361.71 × 112,916.64
  4. Step 4: Simplify right side
    189,403.32x = 29,512,086,117.85
  5. Step 5: Solve for x
    x = 29,512,086,117.85/189,403.32
  6. Step 6: Final answer
    x = 155,816.10

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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.