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Finding the Fourth Proportional to 70,009.18, 96,609.18 and 39,790.51

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Solution

The fourth proportional to 70,009.18, 96,609.18 and 39,790.51 is: 54,908.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,009.18 : 96,609.18 = 39,790.51 : x
  2. Step 2: Convert to fraction form
    70,009.18/96,609.18 = 39,790.51/x
  3. Step 3: Cross multiply
    70,009.18x = 96,609.18 × 39,790.51
  4. Step 4: Simplify right side
    70,009.18x = 3,844,128,542.88
  5. Step 5: Solve for x
    x = 3,844,128,542.88/70,009.18
  6. Step 6: Final answer
    x = 54,908.92

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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.