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Finding the Fourth Proportional to 139,572.76, 209,369.14 and 58,438.13

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Solution

The fourth proportional to 139,572.76, 209,369.14 and 58,438.13 is: 87,661.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,572.76 : 209,369.14 = 58,438.13 : x
  2. Step 2: Convert to fraction form
    139,572.76/209,369.14 = 58,438.13/x
  3. Step 3: Cross multiply
    139,572.76x = 209,369.14 × 58,438.13
  4. Step 4: Simplify right side
    139,572.76x = 12,235,141,021.31
  5. Step 5: Solve for x
    x = 12,235,141,021.31/139,572.76
  6. Step 6: Final answer
    x = 87,661.39

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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.