Home / 78,579.05-108,438.99-42,768.98

Finding the Fourth Proportional to 78,579.05, 108,438.99 and 42,768.98

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Solution

The fourth proportional to 78,579.05, 108,438.99 and 42,768.98 is: 59,021.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,579.05 : 108,438.99 = 42,768.98 : x
  2. Step 2: Convert to fraction form
    78,579.05/108,438.99 = 42,768.98/x
  3. Step 3: Cross multiply
    78,579.05x = 108,438.99 × 42,768.98
  4. Step 4: Simplify right side
    78,579.05x = 4,637,824,452.34
  5. Step 5: Solve for x
    x = 4,637,824,452.34/78,579.05
  6. Step 6: Final answer
    x = 59,021.14

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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.