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Finding the Fourth Proportional to 103,399.70, 142,690.70 and 58,078.38

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Solution

The fourth proportional to 103,399.70, 142,690.70 and 58,078.38 is: 80,147.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,399.70 : 142,690.70 = 58,078.38 : x
  2. Step 2: Convert to fraction form
    103,399.70/142,690.70 = 58,078.38/x
  3. Step 3: Cross multiply
    103,399.70x = 142,690.70 × 58,078.38
  4. Step 4: Simplify right side
    103,399.70x = 8,287,244,697.07
  5. Step 5: Solve for x
    x = 8,287,244,697.07/103,399.70
  6. Step 6: Final answer
    x = 80,147.67

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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.