Home / 218,688.12-328,081.86-66,898.98

Finding the Fourth Proportional to 218,688.12, 328,081.86 and 66,898.98

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Solution

The fourth proportional to 218,688.12, 328,081.86 and 66,898.98 is: 100,363.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,688.12 : 328,081.86 = 66,898.98 : x
  2. Step 2: Convert to fraction form
    218,688.12/328,081.86 = 66,898.98/x
  3. Step 3: Cross multiply
    218,688.12x = 328,081.86 × 66,898.98
  4. Step 4: Simplify right side
    218,688.12x = 21,948,341,790.50
  5. Step 5: Solve for x
    x = 21,948,341,790.50/218,688.12
  6. Step 6: Final answer
    x = 100,363.67

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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.