Home / 209,946.18-289,638.50-123,871

Finding the Fourth Proportional to 209,946.18, 289,638.50 and 123,871

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Solution

The fourth proportional to 209,946.18, 289,638.50 and 123,871 is: 170,890.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,946.18 : 289,638.50 = 123,871 : x
  2. Step 2: Convert to fraction form
    209,946.18/289,638.50 = 123,871/x
  3. Step 3: Cross multiply
    209,946.18x = 289,638.50 × 123,871
  4. Step 4: Simplify right side
    209,946.18x = 35,877,810,633.50
  5. Step 5: Solve for x
    x = 35,877,810,633.50/209,946.18
  6. Step 6: Final answer
    x = 170,890.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.