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Finding the Fourth Proportional to 139,894.36, 209,779.81 and 40,031.82

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Solution

The fourth proportional to 139,894.36, 209,779.81 and 40,031.82 is: 60,030.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,894.36 : 209,779.81 = 40,031.82 : x
  2. Step 2: Convert to fraction form
    139,894.36/209,779.81 = 40,031.82/x
  3. Step 3: Cross multiply
    139,894.36x = 209,779.81 × 40,031.82
  4. Step 4: Simplify right side
    139,894.36x = 8,397,867,493.47
  5. Step 5: Solve for x
    x = 8,397,867,493.47/139,894.36
  6. Step 6: Final answer
    x = 60,030.07

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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.