Home / 70,815.72-97,721.92-38,978.48

Finding the Fourth Proportional to 70,815.72, 97,721.92 and 38,978.48

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Solution

The fourth proportional to 70,815.72, 97,721.92 and 38,978.48 is: 53,788.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,815.72 : 97,721.92 = 38,978.48 : x
  2. Step 2: Convert to fraction form
    70,815.72/97,721.92 = 38,978.48/x
  3. Step 3: Cross multiply
    70,815.72x = 97,721.92 × 38,978.48
  4. Step 4: Simplify right side
    70,815.72x = 3,809,051,904.28
  5. Step 5: Solve for x
    x = 3,809,051,904.28/70,815.72
  6. Step 6: Final answer
    x = 53,788.23

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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.