Home / 77,143.44-115,780.91-30,429.12

Finding the Fourth Proportional to 77,143.44, 115,780.91 and 30,429.12

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Solution

The fourth proportional to 77,143.44, 115,780.91 and 30,429.12 is: 45,669.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,143.44 : 115,780.91 = 30,429.12 : x
  2. Step 2: Convert to fraction form
    77,143.44/115,780.91 = 30,429.12/x
  3. Step 3: Cross multiply
    77,143.44x = 115,780.91 × 30,429.12
  4. Step 4: Simplify right side
    77,143.44x = 3,523,111,204.10
  5. Step 5: Solve for x
    x = 3,523,111,204.10/77,143.44
  6. Step 6: Final answer
    x = 45,669.61

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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.