Home / 103,548.51-142,945.09-78,065.24

Finding the Fourth Proportional to 103,548.51, 142,945.09 and 78,065.24

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Solution

The fourth proportional to 103,548.51, 142,945.09 and 78,065.24 is: 107,766.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,548.51 : 142,945.09 = 78,065.24 : x
  2. Step 2: Convert to fraction form
    103,548.51/142,945.09 = 78,065.24/x
  3. Step 3: Cross multiply
    103,548.51x = 142,945.09 × 78,065.24
  4. Step 4: Simplify right side
    103,548.51x = 11,159,041,847.78
  5. Step 5: Solve for x
    x = 11,159,041,847.78/103,548.51
  6. Step 6: Final answer
    x = 107,766.32

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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.