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Finding the Fourth Proportional to 157,021.83, 216,683.88 and 85,401.92

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Solution

The fourth proportional to 157,021.83, 216,683.88 and 85,401.92 is: 117,851.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,021.83 : 216,683.88 = 85,401.92 : x
  2. Step 2: Convert to fraction form
    157,021.83/216,683.88 = 85,401.92/x
  3. Step 3: Cross multiply
    157,021.83x = 216,683.88 × 85,401.92
  4. Step 4: Simplify right side
    157,021.83x = 18,505,218,301.63
  5. Step 5: Solve for x
    x = 18,505,218,301.63/157,021.83
  6. Step 6: Final answer
    x = 117,851.25

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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.