Home / 77,142.94-115,780.16-30,428.62

Finding the Fourth Proportional to 77,142.94, 115,780.16 and 30,428.62

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Solution

The fourth proportional to 77,142.94, 115,780.16 and 30,428.62 is: 45,668.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,142.94 : 115,780.16 = 30,428.62 : x
  2. Step 2: Convert to fraction form
    77,142.94/115,780.16 = 30,428.62/x
  3. Step 3: Cross multiply
    77,142.94x = 115,780.16 × 30,428.62
  4. Step 4: Simplify right side
    77,142.94x = 3,523,030,492.18
  5. Step 5: Solve for x
    x = 3,523,030,492.18/77,142.94
  6. Step 6: Final answer
    x = 45,668.86

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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.