Home / 105,442.72-145,512.78-57,696.86

Finding the Fourth Proportional to 105,442.72, 145,512.78 and 57,696.86

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Solution

The fourth proportional to 105,442.72, 145,512.78 and 57,696.86 is: 79,622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,442.72 : 145,512.78 = 57,696.86 : x
  2. Step 2: Convert to fraction form
    105,442.72/145,512.78 = 57,696.86/x
  3. Step 3: Cross multiply
    105,442.72x = 145,512.78 × 57,696.86
  4. Step 4: Simplify right side
    105,442.72x = 8,395,630,753.06
  5. Step 5: Solve for x
    x = 8,395,630,753.06/105,442.72
  6. Step 6: Final answer
    x = 79,622.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.