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Finding the Fourth Proportional to 124,226, 171,431.16 and 70,521.20

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Solution

The fourth proportional to 124,226, 171,431.16 and 70,521.20 is: 97,318.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,226 : 171,431.16 = 70,521.20 : x
  2. Step 2: Convert to fraction form
    124,226/171,431.16 = 70,521.20/x
  3. Step 3: Cross multiply
    124,226x = 171,431.16 × 70,521.20
  4. Step 4: Simplify right side
    124,226x = 12,089,531,120.59
  5. Step 5: Solve for x
    x = 12,089,531,120.59/124,226
  6. Step 6: Final answer
    x = 97,318.85

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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.