Home / 78,009.36-107,653.04-42,199.28

Finding the Fourth Proportional to 78,009.36, 107,653.04 and 42,199.28

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Solution

The fourth proportional to 78,009.36, 107,653.04 and 42,199.28 is: 58,235.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,009.36 : 107,653.04 = 42,199.28 : x
  2. Step 2: Convert to fraction form
    78,009.36/107,653.04 = 42,199.28/x
  3. Step 3: Cross multiply
    78,009.36x = 107,653.04 × 42,199.28
  4. Step 4: Simplify right side
    78,009.36x = 4,542,880,777.81
  5. Step 5: Solve for x
    x = 4,542,880,777.81/78,009.36
  6. Step 6: Final answer
    x = 58,235.07

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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.