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Finding the Fourth Proportional to 245,639.38, 368,523.46 and 77,152.90

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Solution

The fourth proportional to 245,639.38, 368,523.46 and 77,152.90 is: 115,749.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,639.38 : 368,523.46 = 77,152.90 : x
  2. Step 2: Convert to fraction form
    245,639.38/368,523.46 = 77,152.90/x
  3. Step 3: Cross multiply
    245,639.38x = 368,523.46 × 77,152.90
  4. Step 4: Simplify right side
    245,639.38x = 28,432,653,657.03
  5. Step 5: Solve for x
    x = 28,432,653,657.03/245,639.38
  6. Step 6: Final answer
    x = 115,749.57

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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.