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Finding the Fourth Proportional to 218,859.40, 328,094.70 and 130,018.60

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Solution

The fourth proportional to 218,859.40, 328,094.70 and 130,018.60 is: 194,912.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,859.40 : 328,094.70 = 130,018.60 : x
  2. Step 2: Convert to fraction form
    218,859.40/328,094.70 = 130,018.60/x
  3. Step 3: Cross multiply
    218,859.40x = 328,094.70 × 130,018.60
  4. Step 4: Simplify right side
    218,859.40x = 42,658,413,561.42
  5. Step 5: Solve for x
    x = 42,658,413,561.42/218,859.40
  6. Step 6: Final answer
    x = 194,912.41

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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.