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Finding the Fourth Proportional to 138,720.76, 208,079.82 and 43,950.68

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Solution

The fourth proportional to 138,720.76, 208,079.82 and 43,950.68 is: 65,925.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,720.76 : 208,079.82 = 43,950.68 : x
  2. Step 2: Convert to fraction form
    138,720.76/208,079.82 = 43,950.68/x
  3. Step 3: Cross multiply
    138,720.76x = 208,079.82 × 43,950.68
  4. Step 4: Simplify right side
    138,720.76x = 9,145,249,583.28
  5. Step 5: Solve for x
    x = 9,145,249,583.28/138,720.76
  6. Step 6: Final answer
    x = 65,925.60

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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.