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Finding the Fourth Proportional to 70,543.71, 105,818.81 and 17,953.65

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Solution

The fourth proportional to 70,543.71, 105,818.81 and 17,953.65 is: 26,931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,543.71 : 105,818.81 = 17,953.65 : x
  2. Step 2: Convert to fraction form
    70,543.71/105,818.81 = 17,953.65/x
  3. Step 3: Cross multiply
    70,543.71x = 105,818.81 × 17,953.65
  4. Step 4: Simplify right side
    70,543.71x = 1,899,833,788.39
  5. Step 5: Solve for x
    x = 1,899,833,788.39/70,543.71
  6. Step 6: Final answer
    x = 26,931.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.