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Finding the Fourth Proportional to 213,790.67, 320,735.88 and 61,990.92

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Solution

The fourth proportional to 213,790.67, 320,735.88 and 61,990.92 is: 93,000.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,790.67 : 320,735.88 = 61,990.92 : x
  2. Step 2: Convert to fraction form
    213,790.67/320,735.88 = 61,990.92/x
  3. Step 3: Cross multiply
    213,790.67x = 320,735.88 × 61,990.92
  4. Step 4: Simplify right side
    213,790.67x = 19,882,712,278.21
  5. Step 5: Solve for x
    x = 19,882,712,278.21/213,790.67
  6. Step 6: Final answer
    x = 93,000.84

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1.5x scale

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.