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Finding the Fourth Proportional to 238,079.78, 328,555.05 and 130,643.54

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Solution

The fourth proportional to 238,079.78, 328,555.05 and 130,643.54 is: 180,290.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,079.78 : 328,555.05 = 130,643.54 : x
  2. Step 2: Convert to fraction form
    238,079.78/328,555.05 = 130,643.54/x
  3. Step 3: Cross multiply
    238,079.78x = 328,555.05 × 130,643.54
  4. Step 4: Simplify right side
    238,079.78x = 42,923,594,816.88
  5. Step 5: Solve for x
    x = 42,923,594,816.88/238,079.78
  6. Step 6: Final answer
    x = 180,290.80

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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.