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Finding the Fourth Proportional to 70,859.61, 97,781.76 and 39,028.50

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Solution

The fourth proportional to 70,859.61, 97,781.76 and 39,028.50 is: 53,856.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,859.61 : 97,781.76 = 39,028.50 : x
  2. Step 2: Convert to fraction form
    70,859.61/97,781.76 = 39,028.50/x
  3. Step 3: Cross multiply
    70,859.61x = 97,781.76 × 39,028.50
  4. Step 4: Simplify right side
    70,859.61x = 3,816,275,420.16
  5. Step 5: Solve for x
    x = 3,816,275,420.16/70,859.61
  6. Step 6: Final answer
    x = 53,856.85

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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.