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Finding the Fourth Proportional to 157,403.93, 217,217.70 and 85,783.91

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Solution

The fourth proportional to 157,403.93, 217,217.70 and 85,783.91 is: 118,381.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,403.93 : 217,217.70 = 85,783.91 : x
  2. Step 2: Convert to fraction form
    157,403.93/217,217.70 = 85,783.91/x
  3. Step 3: Cross multiply
    157,403.93x = 217,217.70 × 85,783.91
  4. Step 4: Simplify right side
    157,403.93x = 18,633,782,541.12
  5. Step 5: Solve for x
    x = 18,633,782,541.12/157,403.93
  6. Step 6: Final answer
    x = 118,381.94

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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.