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Finding the Fourth Proportional to 70,428.84, 105,636.90 and 26,055.96

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Solution

The fourth proportional to 70,428.84, 105,636.90 and 26,055.96 is: 39,081.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,428.84 : 105,636.90 = 26,055.96 : x
  2. Step 2: Convert to fraction form
    70,428.84/105,636.90 = 26,055.96/x
  3. Step 3: Cross multiply
    70,428.84x = 105,636.90 × 26,055.96
  4. Step 4: Simplify right side
    70,428.84x = 2,752,470,840.92
  5. Step 5: Solve for x
    x = 2,752,470,840.92/70,428.84
  6. Step 6: Final answer
    x = 39,081.59

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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.