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Finding the Fourth Proportional to 78,650.50, 108,537.69 and 45,127.30

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Solution

The fourth proportional to 78,650.50, 108,537.69 and 45,127.30 is: 62,275.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,650.50 : 108,537.69 = 45,127.30 : x
  2. Step 2: Convert to fraction form
    78,650.50/108,537.69 = 45,127.30/x
  3. Step 3: Cross multiply
    78,650.50x = 108,537.69 × 45,127.30
  4. Step 4: Simplify right side
    78,650.50x = 4,898,012,897.94
  5. Step 5: Solve for x
    x = 4,898,012,897.94/78,650.50
  6. Step 6: Final answer
    x = 62,275.67

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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.