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Finding the Fourth Proportional to 345,855.62, 518,762.48 and 129,671.69

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Solution

The fourth proportional to 345,855.62, 518,762.48 and 129,671.69 is: 194,499.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,855.62 : 518,762.48 = 129,671.69 : x
  2. Step 2: Convert to fraction form
    345,855.62/518,762.48 = 129,671.69/x
  3. Step 3: Cross multiply
    345,855.62x = 518,762.48 × 129,671.69
  4. Step 4: Simplify right side
    345,855.62x = 67,268,804,248.02
  5. Step 5: Solve for x
    x = 67,268,804,248.02/345,855.62
  6. Step 6: Final answer
    x = 194,499.67

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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.