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Finding the Fourth Proportional to 173,428.93, 239,370.53 and 105,431.50

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Solution

The fourth proportional to 173,428.93, 239,370.53 and 105,431.50 is: 145,518.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,428.93 : 239,370.53 = 105,431.50 : x
  2. Step 2: Convert to fraction form
    173,428.93/239,370.53 = 105,431.50/x
  3. Step 3: Cross multiply
    173,428.93x = 239,370.53 × 105,431.50
  4. Step 4: Simplify right side
    173,428.93x = 25,237,194,033.70
  5. Step 5: Solve for x
    x = 25,237,194,033.70/173,428.93
  6. Step 6: Final answer
    x = 145,518.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.