Home / 78,021.18-116,961.93-28,089.54

Finding the Fourth Proportional to 78,021.18, 116,961.93 and 28,089.54

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Solution

The fourth proportional to 78,021.18, 116,961.93 and 28,089.54 is: 42,109.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,021.18 : 116,961.93 = 28,089.54 : x
  2. Step 2: Convert to fraction form
    78,021.18/116,961.93 = 28,089.54/x
  3. Step 3: Cross multiply
    78,021.18x = 116,961.93 × 28,089.54
  4. Step 4: Simplify right side
    78,021.18x = 3,285,406,811.21
  5. Step 5: Solve for x
    x = 3,285,406,811.21/78,021.18
  6. Step 6: Final answer
    x = 42,109.17

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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.