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Finding the Fourth Proportional to 318,466.10, 477,725.09 and 90,779.14

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Solution

The fourth proportional to 318,466.10, 477,725.09 and 90,779.14 is: 136,176.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,466.10 : 477,725.09 = 90,779.14 : x
  2. Step 2: Convert to fraction form
    318,466.10/477,725.09 = 90,779.14/x
  3. Step 3: Cross multiply
    318,466.10x = 477,725.09 × 90,779.14
  4. Step 4: Simplify right side
    318,466.10x = 43,367,471,178.41
  5. Step 5: Solve for x
    x = 43,367,471,178.41/318,466.10
  6. Step 6: Final answer
    x = 136,176.10

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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.