Home / 80,306.47-120,570.05-40,890.07

Finding the Fourth Proportional to 80,306.47, 120,570.05 and 40,890.07

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Solution

The fourth proportional to 80,306.47, 120,570.05 and 40,890.07 is: 61,391.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,306.47 : 120,570.05 = 40,890.07 : x
  2. Step 2: Convert to fraction form
    80,306.47/120,570.05 = 40,890.07/x
  3. Step 3: Cross multiply
    80,306.47x = 120,570.05 × 40,890.07
  4. Step 4: Simplify right side
    80,306.47x = 4,930,117,784.40
  5. Step 5: Solve for x
    x = 4,930,117,784.40/80,306.47
  6. Step 6: Final answer
    x = 61,391.29

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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.