Home / 103,675.60-155,677.43-78,743.80

Finding the Fourth Proportional to 103,675.60, 155,677.43 and 78,743.80

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Solution

The fourth proportional to 103,675.60, 155,677.43 and 78,743.80 is: 118,240.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,675.60 : 155,677.43 = 78,743.80 : x
  2. Step 2: Convert to fraction form
    103,675.60/155,677.43 = 78,743.80/x
  3. Step 3: Cross multiply
    103,675.60x = 155,677.43 × 78,743.80
  4. Step 4: Simplify right side
    103,675.60x = 12,258,632,412.43
  5. Step 5: Solve for x
    x = 12,258,632,412.43/103,675.60
  6. Step 6: Final answer
    x = 118,240.28

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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.