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Finding the Fourth Proportional to 220,835.50, 304,728.72 and 124,019.71

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Solution

The fourth proportional to 220,835.50, 304,728.72 and 124,019.71 is: 171,133.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,835.50 : 304,728.72 = 124,019.71 : x
  2. Step 2: Convert to fraction form
    220,835.50/304,728.72 = 124,019.71/x
  3. Step 3: Cross multiply
    220,835.50x = 304,728.72 × 124,019.71
  4. Step 4: Simplify right side
    220,835.50x = 37,792,367,483.07
  5. Step 5: Solve for x
    x = 37,792,367,483.07/220,835.50
  6. Step 6: Final answer
    x = 171,133.57

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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.