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Finding the Fourth Proportional to 85,779.89, 118,374.80 and 47,539.31

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Solution

The fourth proportional to 85,779.89, 118,374.80 and 47,539.31 is: 65,603.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,779.89 : 118,374.80 = 47,539.31 : x
  2. Step 2: Convert to fraction form
    85,779.89/118,374.80 = 47,539.31/x
  3. Step 3: Cross multiply
    85,779.89x = 118,374.80 × 47,539.31
  4. Step 4: Simplify right side
    85,779.89x = 5,627,455,483.82
  5. Step 5: Solve for x
    x = 5,627,455,483.82/85,779.89
  6. Step 6: Final answer
    x = 65,603.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.