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Finding the Fourth Proportional to 103,605.56, 142,975.46 and 58,283.57

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Solution

The fourth proportional to 103,605.56, 142,975.46 and 58,283.57 is: 80,431.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,605.56 : 142,975.46 = 58,283.57 : x
  2. Step 2: Convert to fraction form
    103,605.56/142,975.46 = 58,283.57/x
  3. Step 3: Cross multiply
    103,605.56x = 142,975.46 × 58,283.57
  4. Step 4: Simplify right side
    103,605.56x = 8,333,119,761.06
  5. Step 5: Solve for x
    x = 8,333,119,761.06/103,605.56
  6. Step 6: Final answer
    x = 80,431.21

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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.