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Finding the Fourth Proportional to 139,246.70, 208,881.08 and 39,407.51

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Solution

The fourth proportional to 139,246.70, 208,881.08 and 39,407.51 is: 59,114.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,246.70 : 208,881.08 = 39,407.51 : x
  2. Step 2: Convert to fraction form
    139,246.70/208,881.08 = 39,407.51/x
  3. Step 3: Cross multiply
    139,246.70x = 208,881.08 × 39,407.51
  4. Step 4: Simplify right side
    139,246.70x = 8,231,482,007.47
  5. Step 5: Solve for x
    x = 8,231,482,007.47/139,246.70
  6. Step 6: Final answer
    x = 59,114.38

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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.