Home / 77,143.94-115,781.66-30,429.62

Finding the Fourth Proportional to 77,143.94, 115,781.66 and 30,429.62

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Solution

The fourth proportional to 77,143.94, 115,781.66 and 30,429.62 is: 45,670.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,143.94 : 115,781.66 = 30,429.62 : x
  2. Step 2: Convert to fraction form
    77,143.94/115,781.66 = 30,429.62/x
  3. Step 3: Cross multiply
    77,143.94x = 115,781.66 × 30,429.62
  4. Step 4: Simplify right side
    77,143.94x = 3,523,191,916.77
  5. Step 5: Solve for x
    x = 3,523,191,916.77/77,143.94
  6. Step 6: Final answer
    x = 45,670.37

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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.