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Finding the Fourth Proportional to 70,043.08, 105,004.90 and 30,570.68

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Solution

The fourth proportional to 70,043.08, 105,004.90 and 30,570.68 is: 45,829.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,043.08 : 105,004.90 = 30,570.68 : x
  2. Step 2: Convert to fraction form
    70,043.08/105,004.90 = 30,570.68/x
  3. Step 3: Cross multiply
    70,043.08x = 105,004.90 × 30,570.68
  4. Step 4: Simplify right side
    70,043.08x = 3,210,071,196.33
  5. Step 5: Solve for x
    x = 3,210,071,196.33/70,043.08
  6. Step 6: Final answer
    x = 45,829.95

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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.