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Finding the Fourth Proportional to 316,759.21, 475,039.53 and 103,478.50

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Solution

The fourth proportional to 316,759.21, 475,039.53 and 103,478.50 is: 155,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,759.21 : 475,039.53 = 103,478.50 : x
  2. Step 2: Convert to fraction form
    316,759.21/475,039.53 = 103,478.50/x
  3. Step 3: Cross multiply
    316,759.21x = 475,039.53 × 103,478.50
  4. Step 4: Simplify right side
    316,759.21x = 49,156,378,005.11
  5. Step 5: Solve for x
    x = 49,156,378,005.11/316,759.21
  6. Step 6: Final answer
    x = 155,185.32

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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.