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Finding the Fourth Proportional to 157,511.40, 217,362.84 and 85,889.88

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Solution

The fourth proportional to 157,511.40, 217,362.84 and 85,889.88 is: 118,526.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,511.40 : 217,362.84 = 85,889.88 : x
  2. Step 2: Convert to fraction form
    157,511.40/217,362.84 = 85,889.88/x
  3. Step 3: Cross multiply
    157,511.40x = 217,362.84 × 85,889.88
  4. Step 4: Simplify right side
    157,511.40x = 18,669,268,244.06
  5. Step 5: Solve for x
    x = 18,669,268,244.06/157,511.40
  6. Step 6: Final answer
    x = 118,526.46

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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.