Home / 100,739.42-139,025.10-58,289.74

Finding the Fourth Proportional to 100,739.42, 139,025.10 and 58,289.74

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Solution

The fourth proportional to 100,739.42, 139,025.10 and 58,289.74 is: 80,442.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,739.42 : 139,025.10 = 58,289.74 : x
  2. Step 2: Convert to fraction form
    100,739.42/139,025.10 = 58,289.74/x
  3. Step 3: Cross multiply
    100,739.42x = 139,025.10 × 58,289.74
  4. Step 4: Simplify right side
    100,739.42x = 8,103,736,932.47
  5. Step 5: Solve for x
    x = 8,103,736,932.47/100,739.42
  6. Step 6: Final answer
    x = 80,442.56

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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.