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Finding the Fourth Proportional to 103,634.35, 155,451.53 and 91,970.35

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Solution

The fourth proportional to 103,634.35, 155,451.53 and 91,970.35 is: 137,955.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,634.35 : 155,451.53 = 91,970.35 : x
  2. Step 2: Convert to fraction form
    103,634.35/155,451.53 = 91,970.35/x
  3. Step 3: Cross multiply
    103,634.35x = 155,451.53 × 91,970.35
  4. Step 4: Simplify right side
    103,634.35x = 14,296,931,622.14
  5. Step 5: Solve for x
    x = 14,296,931,622.14/103,634.35
  6. Step 6: Final answer
    x = 137,955.53

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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.