Home / 103,557.93-142,958.07-78,074.61

Finding the Fourth Proportional to 103,557.93, 142,958.07 and 78,074.61

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Solution

The fourth proportional to 103,557.93, 142,958.07 and 78,074.61 is: 107,779.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,557.93 : 142,958.07 = 78,074.61 : x
  2. Step 2: Convert to fraction form
    103,557.93/142,958.07 = 78,074.61/x
  3. Step 3: Cross multiply
    103,557.93x = 142,958.07 × 78,074.61
  4. Step 4: Simplify right side
    103,557.93x = 11,161,395,561.60
  5. Step 5: Solve for x
    x = 11,161,395,561.60/103,557.93
  6. Step 6: Final answer
    x = 107,779.25

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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.