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Finding the Fourth Proportional to 99,683.70, 137,589.71 and 56,688.29

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Solution

The fourth proportional to 99,683.70, 137,589.71 and 56,688.29 is: 78,244.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,683.70 : 137,589.71 = 56,688.29 : x
  2. Step 2: Convert to fraction form
    99,683.70/137,589.71 = 56,688.29/x
  3. Step 3: Cross multiply
    99,683.70x = 137,589.71 × 56,688.29
  4. Step 4: Simplify right side
    99,683.70x = 7,799,724,926.07
  5. Step 5: Solve for x
    x = 7,799,724,926.07/99,683.70
  6. Step 6: Final answer
    x = 78,244.74

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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.