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Finding the Fourth Proportional to 101,280.90, 139,739.21 and 58,258.14

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Solution

The fourth proportional to 101,280.90, 139,739.21 and 58,258.14 is: 80,379.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,280.90 : 139,739.21 = 58,258.14 : x
  2. Step 2: Convert to fraction form
    101,280.90/139,739.21 = 58,258.14/x
  3. Step 3: Cross multiply
    101,280.90x = 139,739.21 × 58,258.14
  4. Step 4: Simplify right side
    101,280.90x = 8,140,946,168.38
  5. Step 5: Solve for x
    x = 8,140,946,168.38/101,280.90
  6. Step 6: Final answer
    x = 80,379.88

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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.