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Finding the Fourth Proportional to 68,139.53, 94,024.69 and 39,459.74

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Solution

The fourth proportional to 68,139.53, 94,024.69 and 39,459.74 is: 54,449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,139.53 : 94,024.69 = 39,459.74 : x
  2. Step 2: Convert to fraction form
    68,139.53/94,024.69 = 39,459.74/x
  3. Step 3: Cross multiply
    68,139.53x = 94,024.69 × 39,459.74
  4. Step 4: Simplify right side
    68,139.53x = 3,710,189,820.98
  5. Step 5: Solve for x
    x = 3,710,189,820.98/68,139.53
  6. Step 6: Final answer
    x = 54,449.89

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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.