Home / 103,837.60-155,756.40-68,408.20

Finding the Fourth Proportional to 103,837.60, 155,756.40 and 68,408.20

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Solution

The fourth proportional to 103,837.60, 155,756.40 and 68,408.20 is: 102,612.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,837.60 : 155,756.40 = 68,408.20 : x
  2. Step 2: Convert to fraction form
    103,837.60/155,756.40 = 68,408.20/x
  3. Step 3: Cross multiply
    103,837.60x = 155,756.40 × 68,408.20
  4. Step 4: Simplify right side
    103,837.60x = 10,655,014,962.48
  5. Step 5: Solve for x
    x = 10,655,014,962.48/103,837.60
  6. Step 6: Final answer
    x = 102,612.30

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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.