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Finding the Fourth Proportional to 218,813.70, 328,220.61 and 69,065.67

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Solution

The fourth proportional to 218,813.70, 328,220.61 and 69,065.67 is: 103,598.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,813.70 : 328,220.61 = 69,065.67 : x
  2. Step 2: Convert to fraction form
    218,813.70/328,220.61 = 69,065.67/x
  3. Step 3: Cross multiply
    218,813.70x = 328,220.61 × 69,065.67
  4. Step 4: Simplify right side
    218,813.70x = 22,668,776,337.46
  5. Step 5: Solve for x
    x = 22,668,776,337.46/218,813.70
  6. Step 6: Final answer
    x = 103,598.52

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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.