Home / 79,436.72-119,155.02-20,272.40

Finding the Fourth Proportional to 79,436.72, 119,155.02 and 20,272.40

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Solution

The fourth proportional to 79,436.72, 119,155.02 and 20,272.40 is: 30,408.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,436.72 : 119,155.02 = 20,272.40 : x
  2. Step 2: Convert to fraction form
    79,436.72/119,155.02 = 20,272.40/x
  3. Step 3: Cross multiply
    79,436.72x = 119,155.02 × 20,272.40
  4. Step 4: Simplify right side
    79,436.72x = 2,415,558,227.45
  5. Step 5: Solve for x
    x = 2,415,558,227.45/79,436.72
  6. Step 6: Final answer
    x = 30,408.58

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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.