Home / 103,509.36-142,741.44-65,718

Finding the Fourth Proportional to 103,509.36, 142,741.44 and 65,718

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Solution

The fourth proportional to 103,509.36, 142,741.44 and 65,718 is: 90,626.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,509.36 : 142,741.44 = 65,718 : x
  2. Step 2: Convert to fraction form
    103,509.36/142,741.44 = 65,718/x
  3. Step 3: Cross multiply
    103,509.36x = 142,741.44 × 65,718
  4. Step 4: Simplify right side
    103,509.36x = 9,380,681,953.92
  5. Step 5: Solve for x
    x = 9,380,681,953.92/103,509.36
  6. Step 6: Final answer
    x = 90,626.41

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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.