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Finding the Fourth Proportional to 70,871.86, 97,711.95 and 58,078.18

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Solution

The fourth proportional to 70,871.86, 97,711.95 and 58,078.18 is: 80,073.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,871.86 : 97,711.95 = 58,078.18 : x
  2. Step 2: Convert to fraction form
    70,871.86/97,711.95 = 58,078.18/x
  3. Step 3: Cross multiply
    70,871.86x = 97,711.95 × 58,078.18
  4. Step 4: Simplify right side
    70,871.86x = 5,674,932,220.25
  5. Step 5: Solve for x
    x = 5,674,932,220.25/70,871.86
  6. Step 6: Final answer
    x = 80,073.14

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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.