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Finding the Fourth Proportional to 123,417.20, 184,866.60 and 67,948.40

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Solution

The fourth proportional to 123,417.20, 184,866.60 and 67,948.40 is: 101,779.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,417.20 : 184,866.60 = 67,948.40 : x
  2. Step 2: Convert to fraction form
    123,417.20/184,866.60 = 67,948.40/x
  3. Step 3: Cross multiply
    123,417.20x = 184,866.60 × 67,948.40
  4. Step 4: Simplify right side
    123,417.20x = 12,561,389,683.44
  5. Step 5: Solve for x
    x = 12,561,389,683.44/123,417.20
  6. Step 6: Final answer
    x = 101,779.90

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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.