Home / 78,496,383.69-117,735,302.66-20,993,111.55

Finding the Fourth Proportional to 78,496,383.69, 117,735,302.66 and 20,993,111.55

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Solution

The fourth proportional to 78,496,383.69, 117,735,302.66 and 20,993,111.55 is: 31,487,187.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,496,383.69 : 117,735,302.66 = 20,993,111.55 : x
  2. Step 2: Convert to fraction form
    78,496,383.69/117,735,302.66 = 20,993,111.55/x
  3. Step 3: Cross multiply
    78,496,383.69x = 117,735,302.66 × 20,993,111.55
  4. Step 4: Simplify right side
    78,496,383.69x = 2,471,630,342,009,426.50
  5. Step 5: Solve for x
    x = 2,471,630,342,009,426.50/78,496,383.69
  6. Step 6: Final answer
    x = 31,487,187.38

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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.