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Finding the Fourth Proportional to 57,689.60, 86,525.40 and 18,256.40

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Solution

The fourth proportional to 57,689.60, 86,525.40 and 18,256.40 is: 27,381.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,689.60 : 86,525.40 = 18,256.40 : x
  2. Step 2: Convert to fraction form
    57,689.60/86,525.40 = 18,256.40/x
  3. Step 3: Cross multiply
    57,689.60x = 86,525.40 × 18,256.40
  4. Step 4: Simplify right side
    57,689.60x = 1,579,642,312.56
  5. Step 5: Solve for x
    x = 1,579,642,312.56/57,689.60
  6. Step 6: Final answer
    x = 27,381.75

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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.