Home / 101,315.20-139,784.16-58,865.60

Finding the Fourth Proportional to 101,315.20, 139,784.16 and 58,865.60

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Solution

The fourth proportional to 101,315.20, 139,784.16 and 58,865.60 is: 81,216.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,315.20 : 139,784.16 = 58,865.60 : x
  2. Step 2: Convert to fraction form
    101,315.20/139,784.16 = 58,865.60/x
  3. Step 3: Cross multiply
    101,315.20x = 139,784.16 × 58,865.60
  4. Step 4: Simplify right side
    101,315.20x = 8,228,478,448.90
  5. Step 5: Solve for x
    x = 8,228,478,448.90/101,315.20
  6. Step 6: Final answer
    x = 81,216.62

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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.