Home / 103,811.40-155,457.90-68,560.20

Finding the Fourth Proportional to 103,811.40, 155,457.90 and 68,560.20

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Solution

The fourth proportional to 103,811.40, 155,457.90 and 68,560.20 is: 102,669.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,811.40 : 155,457.90 = 68,560.20 : x
  2. Step 2: Convert to fraction form
    103,811.40/155,457.90 = 68,560.20/x
  3. Step 3: Cross multiply
    103,811.40x = 155,457.90 × 68,560.20
  4. Step 4: Simplify right side
    103,811.40x = 10,658,224,715.58
  5. Step 5: Solve for x
    x = 10,658,224,715.58/103,811.40
  6. Step 6: Final answer
    x = 102,669.12

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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.