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Finding the Fourth Proportional to 115,779.45, 173,669.18 and 78,357.45

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Solution

The fourth proportional to 115,779.45, 173,669.18 and 78,357.45 is: 117,536.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,779.45 : 173,669.18 = 78,357.45 : x
  2. Step 2: Convert to fraction form
    115,779.45/173,669.18 = 78,357.45/x
  3. Step 3: Cross multiply
    115,779.45x = 173,669.18 × 78,357.45
  4. Step 4: Simplify right side
    115,779.45x = 13,608,273,696.60
  5. Step 5: Solve for x
    x = 13,608,273,696.60/115,779.45
  6. Step 6: Final answer
    x = 117,536.18

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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.