Home / 77,154.67-115,720.30-20,999.15

Finding the Fourth Proportional to 77,154.67, 115,720.30 and 20,999.15

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Solution

The fourth proportional to 77,154.67, 115,720.30 and 20,999.15 is: 31,495.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,154.67 : 115,720.30 = 20,999.15 : x
  2. Step 2: Convert to fraction form
    77,154.67/115,720.30 = 20,999.15/x
  3. Step 3: Cross multiply
    77,154.67x = 115,720.30 × 20,999.15
  4. Step 4: Simplify right side
    77,154.67x = 2,430,027,700.94
  5. Step 5: Solve for x
    x = 2,430,027,700.94/77,154.67
  6. Step 6: Final answer
    x = 31,495.54

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1.5x scale

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.