Home / 45,123.54-67,640.66-21,389.40

Finding the Fourth Proportional to 45,123.54, 67,640.66 and 21,389.40

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Solution

The fourth proportional to 45,123.54, 67,640.66 and 21,389.40 is: 32,062.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,123.54 : 67,640.66 = 21,389.40 : x
  2. Step 2: Convert to fraction form
    45,123.54/67,640.66 = 21,389.40/x
  3. Step 3: Cross multiply
    45,123.54x = 67,640.66 × 21,389.40
  4. Step 4: Simplify right side
    45,123.54x = 1,446,793,133.00
  5. Step 5: Solve for x
    x = 1,446,793,133.00/45,123.54
  6. Step 6: Final answer
    x = 32,062.94

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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.