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Finding the Fourth Proportional to 103,795.31, 155,693.12 and 28,915.67

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Solution

The fourth proportional to 103,795.31, 155,693.12 and 28,915.67 is: 43,373.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,795.31 : 155,693.12 = 28,915.67 : x
  2. Step 2: Convert to fraction form
    103,795.31/155,693.12 = 28,915.67/x
  3. Step 3: Cross multiply
    103,795.31x = 155,693.12 × 28,915.67
  4. Step 4: Simplify right side
    103,795.31x = 4,501,970,879.19
  5. Step 5: Solve for x
    x = 4,501,970,879.19/103,795.31
  6. Step 6: Final answer
    x = 43,373.55

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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.