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Finding the Fourth Proportional to 208,779.88, 312,766.72 and 124,607.24

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Solution

The fourth proportional to 208,779.88, 312,766.72 and 124,607.24 is: 186,670.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,779.88 : 312,766.72 = 124,607.24 : x
  2. Step 2: Convert to fraction form
    208,779.88/312,766.72 = 124,607.24/x
  3. Step 3: Cross multiply
    208,779.88x = 312,766.72 × 124,607.24
  4. Step 4: Simplify right side
    208,779.88x = 38,972,997,743.05
  5. Step 5: Solve for x
    x = 38,972,997,743.05/208,779.88
  6. Step 6: Final answer
    x = 186,670.28

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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.