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Finding the Fourth Proportional to 138,697.07, 208,069.34 and 43,925.47

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Solution

The fourth proportional to 138,697.07, 208,069.34 and 43,925.47 is: 65,895.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,697.07 : 208,069.34 = 43,925.47 : x
  2. Step 2: Convert to fraction form
    138,697.07/208,069.34 = 43,925.47/x
  3. Step 3: Cross multiply
    138,697.07x = 208,069.34 × 43,925.47
  4. Step 4: Simplify right side
    138,697.07x = 9,139,542,812.29
  5. Step 5: Solve for x
    x = 9,139,542,812.29/138,697.07
  6. Step 6: Final answer
    x = 65,895.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.