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Finding the Fourth Proportional to 103,640.76, 155,462.97 and 37,128.63

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Solution

The fourth proportional to 103,640.76, 155,462.97 and 37,128.63 is: 55,693.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.76 : 155,462.97 = 37,128.63 : x
  2. Step 2: Convert to fraction form
    103,640.76/155,462.97 = 37,128.63/x
  3. Step 3: Cross multiply
    103,640.76x = 155,462.97 × 37,128.63
  4. Step 4: Simplify right side
    103,640.76x = 5,772,127,091.83
  5. Step 5: Solve for x
    x = 5,772,127,091.83/103,640.76
  6. Step 6: Final answer
    x = 55,693.60

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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.