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Finding the Fourth Proportional to 103,866.60, 155,938.26 and 70,245.56

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Solution

The fourth proportional to 103,866.60, 155,938.26 and 70,245.56 is: 105,461.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,866.60 : 155,938.26 = 70,245.56 : x
  2. Step 2: Convert to fraction form
    103,866.60/155,938.26 = 70,245.56/x
  3. Step 3: Cross multiply
    103,866.60x = 155,938.26 × 70,245.56
  4. Step 4: Simplify right side
    103,866.60x = 10,953,970,399.13
  5. Step 5: Solve for x
    x = 10,953,970,399.13/103,866.60
  6. Step 6: Final answer
    x = 105,461.91

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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.