Home / 103,420.09-154,986.61-47,122.61

Finding the Fourth Proportional to 103,420.09, 154,986.61 and 47,122.61

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Solution

The fourth proportional to 103,420.09, 154,986.61 and 47,122.61 is: 70,618.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,420.09 : 154,986.61 = 47,122.61 : x
  2. Step 2: Convert to fraction form
    103,420.09/154,986.61 = 47,122.61/x
  3. Step 3: Cross multiply
    103,420.09x = 154,986.61 × 47,122.61
  4. Step 4: Simplify right side
    103,420.09x = 7,303,373,847.91
  5. Step 5: Solve for x
    x = 7,303,373,847.91/103,420.09
  6. Step 6: Final answer
    x = 70,618.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.