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Finding the Fourth Proportional to 381,848.80, 572,767.80 and 129,075.40

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Solution

The fourth proportional to 381,848.80, 572,767.80 and 129,075.40 is: 193,611.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,848.80 : 572,767.80 = 129,075.40 : x
  2. Step 2: Convert to fraction form
    381,848.80/572,767.80 = 129,075.40/x
  3. Step 3: Cross multiply
    381,848.80x = 572,767.80 × 129,075.40
  4. Step 4: Simplify right side
    381,848.80x = 73,930,232,892.12
  5. Step 5: Solve for x
    x = 73,930,232,892.12/381,848.80
  6. Step 6: Final answer
    x = 193,611.27

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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.