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Finding the Fourth Proportional to 127,289.40, 190,909.80 and 38,545.80

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Solution

The fourth proportional to 127,289.40, 190,909.80 and 38,545.80 is: 57,811.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,289.40 : 190,909.80 = 38,545.80 : x
  2. Step 2: Convert to fraction form
    127,289.40/190,909.80 = 38,545.80/x
  3. Step 3: Cross multiply
    127,289.40x = 190,909.80 × 38,545.80
  4. Step 4: Simplify right side
    127,289.40x = 7,358,770,968.84
  5. Step 5: Solve for x
    x = 7,358,770,968.84/127,289.40
  6. Step 6: Final answer
    x = 57,811.34

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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.