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Finding the Fourth Proportional to 78,270, 108,012.60 and 44,736.72

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Solution

The fourth proportional to 78,270, 108,012.60 and 44,736.72 is: 61,736.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,270 : 108,012.60 = 44,736.72 : x
  2. Step 2: Convert to fraction form
    78,270/108,012.60 = 44,736.72/x
  3. Step 3: Cross multiply
    78,270x = 108,012.60 × 44,736.72
  4. Step 4: Simplify right side
    78,270x = 4,832,129,442.67
  5. Step 5: Solve for x
    x = 4,832,129,442.67/78,270
  6. Step 6: Final answer
    x = 61,736.67

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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.