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Finding the Fourth Proportional to 70,403.86, 105,343.32 and 69,616.54

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Solution

The fourth proportional to 70,403.86, 105,343.32 and 69,616.54 is: 104,165.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,403.86 : 105,343.32 = 69,616.54 : x
  2. Step 2: Convert to fraction form
    70,403.86/105,343.32 = 69,616.54/x
  3. Step 3: Cross multiply
    70,403.86x = 105,343.32 × 69,616.54
  4. Step 4: Simplify right side
    70,403.86x = 7,333,637,450.51
  5. Step 5: Solve for x
    x = 7,333,637,450.51/70,403.86
  6. Step 6: Final answer
    x = 104,165.28

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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.