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Finding the Fourth Proportional to 189,920.10, 284,880.15 and 123,435.30

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Solution

The fourth proportional to 189,920.10, 284,880.15 and 123,435.30 is: 185,152.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,920.10 : 284,880.15 = 123,435.30 : x
  2. Step 2: Convert to fraction form
    189,920.10/284,880.15 = 123,435.30/x
  3. Step 3: Cross multiply
    189,920.10x = 284,880.15 × 123,435.30
  4. Step 4: Simplify right side
    189,920.10x = 35,164,266,779.30
  5. Step 5: Solve for x
    x = 35,164,266,779.30/189,920.10
  6. Step 6: Final answer
    x = 185,152.95

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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.