Home / 103,838.40-155,757.60-77,266.35

Finding the Fourth Proportional to 103,838.40, 155,757.60 and 77,266.35

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Solution

The fourth proportional to 103,838.40, 155,757.60 and 77,266.35 is: 115,899.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,838.40 : 155,757.60 = 77,266.35 : x
  2. Step 2: Convert to fraction form
    103,838.40/155,757.60 = 77,266.35/x
  3. Step 3: Cross multiply
    103,838.40x = 155,757.60 × 77,266.35
  4. Step 4: Simplify right side
    103,838.40x = 12,034,821,236.76
  5. Step 5: Solve for x
    x = 12,034,821,236.76/103,838.40
  6. Step 6: Final answer
    x = 115,899.53

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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.