Home / 78,015.50-107,661.66-42,205.68

Finding the Fourth Proportional to 78,015.50, 107,661.66 and 42,205.68

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Solution

The fourth proportional to 78,015.50, 107,661.66 and 42,205.68 is: 58,243.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.50 : 107,661.66 = 42,205.68 : x
  2. Step 2: Convert to fraction form
    78,015.50/107,661.66 = 42,205.68/x
  3. Step 3: Cross multiply
    78,015.50x = 107,661.66 × 42,205.68
  4. Step 4: Simplify right side
    78,015.50x = 4,543,933,570.23
  5. Step 5: Solve for x
    x = 4,543,933,570.23/78,015.50
  6. Step 6: Final answer
    x = 58,243.98

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1.5x scale

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.