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Finding the Fourth Proportional to 112,708.78, 155,537.76 and 62,407.78

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Solution

The fourth proportional to 112,708.78, 155,537.76 and 62,407.78 is: 86,122.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,708.78 : 155,537.76 = 62,407.78 : x
  2. Step 2: Convert to fraction form
    112,708.78/155,537.76 = 62,407.78/x
  3. Step 3: Cross multiply
    112,708.78x = 155,537.76 × 62,407.78
  4. Step 4: Simplify right side
    112,708.78x = 9,706,766,307.77
  5. Step 5: Solve for x
    x = 9,706,766,307.77/112,708.78
  6. Step 6: Final answer
    x = 86,122.54

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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.