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Finding the Fourth Proportional to 139,411, 208,998.92 and 60,465.76

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Solution

The fourth proportional to 139,411, 208,998.92 and 60,465.76 is: 90,647.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,411 : 208,998.92 = 60,465.76 : x
  2. Step 2: Convert to fraction form
    139,411/208,998.92 = 60,465.76/x
  3. Step 3: Cross multiply
    139,411x = 208,998.92 × 60,465.76
  4. Step 4: Simplify right side
    139,411x = 12,637,278,536.98
  5. Step 5: Solve for x
    x = 12,637,278,536.98/139,411
  6. Step 6: Final answer
    x = 90,647.64

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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.