Home / 78,198.12-107,913.60-42,387.84

Finding the Fourth Proportional to 78,198.12, 107,913.60 and 42,387.84

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Solution

The fourth proportional to 78,198.12, 107,913.60 and 42,387.84 is: 58,495.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,198.12 : 107,913.60 = 42,387.84 : x
  2. Step 2: Convert to fraction form
    78,198.12/107,913.60 = 42,387.84/x
  3. Step 3: Cross multiply
    78,198.12x = 107,913.60 × 42,387.84
  4. Step 4: Simplify right side
    78,198.12x = 4,574,224,410.62
  5. Step 5: Solve for x
    x = 4,574,224,410.62/78,198.12
  6. Step 6: Final answer
    x = 58,495.32

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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.