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Finding the Fourth Proportional to 139,246.79, 208,881.21 and 39,407.60

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Solution

The fourth proportional to 139,246.79, 208,881.21 and 39,407.60 is: 59,114.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,246.79 : 208,881.21 = 39,407.60 : x
  2. Step 2: Convert to fraction form
    139,246.79/208,881.21 = 39,407.60/x
  3. Step 3: Cross multiply
    139,246.79x = 208,881.21 × 39,407.60
  4. Step 4: Simplify right side
    139,246.79x = 8,231,507,841.18
  5. Step 5: Solve for x
    x = 8,231,507,841.18/139,246.79
  6. Step 6: Final answer
    x = 59,114.53

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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.