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Finding the Fourth Proportional to 78,556.57, 108,407.16 and 42,745.97

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Solution

The fourth proportional to 78,556.57, 108,407.16 and 42,745.97 is: 58,988.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,556.57 : 108,407.16 = 42,745.97 : x
  2. Step 2: Convert to fraction form
    78,556.57/108,407.16 = 42,745.97/x
  3. Step 3: Cross multiply
    78,556.57x = 108,407.16 × 42,745.97
  4. Step 4: Simplify right side
    78,556.57x = 4,633,968,506.81
  5. Step 5: Solve for x
    x = 4,633,968,506.81/78,556.57
  6. Step 6: Final answer
    x = 58,988.94

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1.5x scale

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.