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Finding the Fourth Proportional to 70,362.63, 105,580.40 and 40,400.73

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Solution

The fourth proportional to 70,362.63, 105,580.40 and 40,400.73 is: 60,622.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,362.63 : 105,580.40 = 40,400.73 : x
  2. Step 2: Convert to fraction form
    70,362.63/105,580.40 = 40,400.73/x
  3. Step 3: Cross multiply
    70,362.63x = 105,580.40 × 40,400.73
  4. Step 4: Simplify right side
    70,362.63x = 4,265,525,031.69
  5. Step 5: Solve for x
    x = 4,265,525,031.69/70,362.63
  6. Step 6: Final answer
    x = 60,622.02

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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.