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Finding the Fourth Proportional to 157,553.28, 217,411.20 and 85,929.12

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Solution

The fourth proportional to 157,553.28, 217,411.20 and 85,929.12 is: 118,575.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,553.28 : 217,411.20 = 85,929.12 : x
  2. Step 2: Convert to fraction form
    157,553.28/217,411.20 = 85,929.12/x
  3. Step 3: Cross multiply
    157,553.28x = 217,411.20 × 85,929.12
  4. Step 4: Simplify right side
    157,553.28x = 18,681,953,094.14
  5. Step 5: Solve for x
    x = 18,681,953,094.14/157,553.28
  6. Step 6: Final answer
    x = 118,575.46

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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.