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Finding the Fourth Proportional to 92,956.91, 128,291.47 and 55,231.16

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Solution

The fourth proportional to 92,956.91, 128,291.47 and 55,231.16 is: 76,225.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,956.91 : 128,291.47 = 55,231.16 : x
  2. Step 2: Convert to fraction form
    92,956.91/128,291.47 = 55,231.16/x
  3. Step 3: Cross multiply
    92,956.91x = 128,291.47 × 55,231.16
  4. Step 4: Simplify right side
    92,956.91x = 7,085,686,706.21
  5. Step 5: Solve for x
    x = 7,085,686,706.21/92,956.91
  6. Step 6: Final answer
    x = 76,225.50

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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.