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Finding the Fourth Proportional to 218,967.78, 328,795.38 and 130,615.32

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Solution

The fourth proportional to 218,967.78, 328,795.38 and 130,615.32 is: 196,128.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,967.78 : 328,795.38 = 130,615.32 : x
  2. Step 2: Convert to fraction form
    218,967.78/328,795.38 = 130,615.32/x
  3. Step 3: Cross multiply
    218,967.78x = 328,795.38 × 130,615.32
  4. Step 4: Simplify right side
    218,967.78x = 42,945,713,773.22
  5. Step 5: Solve for x
    x = 42,945,713,773.22/218,967.78
  6. Step 6: Final answer
    x = 196,128.00

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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.