Home / 79,756.09-119,634.60-20,587.72

Finding the Fourth Proportional to 79,756.09, 119,634.60 and 20,587.72

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Solution

The fourth proportional to 79,756.09, 119,634.60 and 20,587.72 is: 30,881.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,756.09 : 119,634.60 = 20,587.72 : x
  2. Step 2: Convert to fraction form
    79,756.09/119,634.60 = 20,587.72/x
  3. Step 3: Cross multiply
    79,756.09x = 119,634.60 × 20,587.72
  4. Step 4: Simplify right side
    79,756.09x = 2,463,003,647.11
  5. Step 5: Solve for x
    x = 2,463,003,647.11/79,756.09
  6. Step 6: Final answer
    x = 30,881.70

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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.