Home / 421,247.20-631,870.80-121,737.55

Finding the Fourth Proportional to 421,247.20, 631,870.80 and 121,737.55

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Solution

The fourth proportional to 421,247.20, 631,870.80 and 121,737.55 is: 182,606.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,247.20 : 631,870.80 = 121,737.55 : x
  2. Step 2: Convert to fraction form
    421,247.20/631,870.80 = 121,737.55/x
  3. Step 3: Cross multiply
    421,247.20x = 631,870.80 × 121,737.55
  4. Step 4: Simplify right side
    421,247.20x = 76,922,403,108.54
  5. Step 5: Solve for x
    x = 76,922,403,108.54/421,247.20
  6. Step 6: Final answer
    x = 182,606.33

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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.