Home / 145,289.49-218,262.30-86,163.94

Finding the Fourth Proportional to 145,289.49, 218,262.30 and 86,163.94

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Solution

The fourth proportional to 145,289.49, 218,262.30 and 86,163.94 is: 129,440.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,289.49 : 218,262.30 = 86,163.94 : x
  2. Step 2: Convert to fraction form
    145,289.49/218,262.30 = 86,163.94/x
  3. Step 3: Cross multiply
    145,289.49x = 218,262.30 × 86,163.94
  4. Step 4: Simplify right side
    145,289.49x = 18,806,339,721.46
  5. Step 5: Solve for x
    x = 18,806,339,721.46/145,289.49
  6. Step 6: Final answer
    x = 129,440.47

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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.