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Finding the Fourth Proportional to 77,145.57, 115,531.52 and 53,386.56

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Solution

The fourth proportional to 77,145.57, 115,531.52 and 53,386.56 is: 79,950.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,145.57 : 115,531.52 = 53,386.56 : x
  2. Step 2: Convert to fraction form
    77,145.57/115,531.52 = 53,386.56/x
  3. Step 3: Cross multiply
    77,145.57x = 115,531.52 × 53,386.56
  4. Step 4: Simplify right side
    77,145.57x = 6,167,830,157.44
  5. Step 5: Solve for x
    x = 6,167,830,157.44/77,145.57
  6. Step 6: Final answer
    x = 79,950.54

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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.