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Finding the Fourth Proportional to 103,624.78, 143,002.20 and 58,912.78

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Solution

The fourth proportional to 103,624.78, 143,002.20 and 58,912.78 is: 81,299.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,624.78 : 143,002.20 = 58,912.78 : x
  2. Step 2: Convert to fraction form
    103,624.78/143,002.20 = 58,912.78/x
  3. Step 3: Cross multiply
    103,624.78x = 143,002.20 × 58,912.78
  4. Step 4: Simplify right side
    103,624.78x = 8,424,657,148.12
  5. Step 5: Solve for x
    x = 8,424,657,148.12/103,624.78
  6. Step 6: Final answer
    x = 81,299.64

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1.5x scale

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.