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Finding the Fourth Proportional to 103,616.60, 155,655.30 and 99,699.80

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Solution

The fourth proportional to 103,616.60, 155,655.30 and 99,699.80 is: 149,771.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,616.60 : 155,655.30 = 99,699.80 : x
  2. Step 2: Convert to fraction form
    103,616.60/155,655.30 = 99,699.80/x
  3. Step 3: Cross multiply
    103,616.60x = 155,655.30 × 99,699.80
  4. Step 4: Simplify right side
    103,616.60x = 15,518,802,278.94
  5. Step 5: Solve for x
    x = 15,518,802,278.94/103,616.60
  6. Step 6: Final answer
    x = 149,771.39

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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.