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Finding the Fourth Proportional to 103,980.56, 155,970.87 and 29,111.74

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Solution

The fourth proportional to 103,980.56, 155,970.87 and 29,111.74 is: 43,667.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,980.56 : 155,970.87 = 29,111.74 : x
  2. Step 2: Convert to fraction form
    103,980.56/155,970.87 = 29,111.74/x
  3. Step 3: Cross multiply
    103,980.56x = 155,970.87 × 29,111.74
  4. Step 4: Simplify right side
    103,980.56x = 4,540,582,915.92
  5. Step 5: Solve for x
    x = 4,540,582,915.92/103,980.56
  6. Step 6: Final answer
    x = 43,667.62

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1.5x scale

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.