Home / 103,942.30-155,683.05-80,492.70

Finding the Fourth Proportional to 103,942.30, 155,683.05 and 80,492.70

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Solution

The fourth proportional to 103,942.30, 155,683.05 and 80,492.70 is: 120,560.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,942.30 : 155,683.05 = 80,492.70 : x
  2. Step 2: Convert to fraction form
    103,942.30/155,683.05 = 80,492.70/x
  3. Step 3: Cross multiply
    103,942.30x = 155,683.05 × 80,492.70
  4. Step 4: Simplify right side
    103,942.30x = 12,531,349,038.74
  5. Step 5: Solve for x
    x = 12,531,349,038.74/103,942.30
  6. Step 6: Final answer
    x = 120,560.63

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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.