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Finding the Fourth Proportional to 259,711.95, 389,518.71 and 91,192.67

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Solution

The fourth proportional to 259,711.95, 389,518.71 and 91,192.67 is: 136,771.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,711.95 : 389,518.71 = 91,192.67 : x
  2. Step 2: Convert to fraction form
    259,711.95/389,518.71 = 91,192.67/x
  3. Step 3: Cross multiply
    259,711.95x = 389,518.71 × 91,192.67
  4. Step 4: Simplify right side
    259,711.95x = 35,521,249,232.26
  5. Step 5: Solve for x
    x = 35,521,249,232.26/259,711.95
  6. Step 6: Final answer
    x = 136,771.72

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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.