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Finding the Fourth Proportional to 191,806.90, 288,038.40 and 125,540.80

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Solution

The fourth proportional to 191,806.90, 288,038.40 and 125,540.80 is: 188,525.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,806.90 : 288,038.40 = 125,540.80 : x
  2. Step 2: Convert to fraction form
    191,806.90/288,038.40 = 125,540.80/x
  3. Step 3: Cross multiply
    191,806.90x = 288,038.40 × 125,540.80
  4. Step 4: Simplify right side
    191,806.90x = 36,160,571,166.72
  5. Step 5: Solve for x
    x = 36,160,571,166.72/191,806.90
  6. Step 6: Final answer
    x = 188,525.91

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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.