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Finding the Fourth Proportional to 124,221.34, 171,428.43 and 70,512.94

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Solution

The fourth proportional to 124,221.34, 171,428.43 and 70,512.94 is: 97,309.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,221.34 : 171,428.43 = 70,512.94 : x
  2. Step 2: Convert to fraction form
    124,221.34/171,428.43 = 70,512.94/x
  3. Step 3: Cross multiply
    124,221.34x = 171,428.43 × 70,512.94
  4. Step 4: Simplify right side
    124,221.34x = 12,087,922,598.88
  5. Step 5: Solve for x
    x = 12,087,922,598.88/124,221.34
  6. Step 6: Final answer
    x = 97,309.55

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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.