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Finding the Fourth Proportional to 139,410.74, 208,998.54 and 60,465.51

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Solution

The fourth proportional to 139,410.74, 208,998.54 and 60,465.51 is: 90,647.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,410.74 : 208,998.54 = 60,465.51 : x
  2. Step 2: Convert to fraction form
    139,410.74/208,998.54 = 60,465.51/x
  3. Step 3: Cross multiply
    139,410.74x = 208,998.54 × 60,465.51
  4. Step 4: Simplify right side
    139,410.74x = 12,637,203,310.36
  5. Step 5: Solve for x
    x = 12,637,203,310.36/139,410.74
  6. Step 6: Final answer
    x = 90,647.28

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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.