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Finding the Fourth Proportional to 111,243.43, 153,392.97 and 85,693.06

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Solution

The fourth proportional to 111,243.43, 153,392.97 and 85,693.06 is: 118,161.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,243.43 : 153,392.97 = 85,693.06 : x
  2. Step 2: Convert to fraction form
    111,243.43/153,392.97 = 85,693.06/x
  3. Step 3: Cross multiply
    111,243.43x = 153,392.97 × 85,693.06
  4. Step 4: Simplify right side
    111,243.43x = 13,144,712,981.79
  5. Step 5: Solve for x
    x = 13,144,712,981.79/111,243.43
  6. Step 6: Final answer
    x = 118,161.70

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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.