Home / 78,100.06-117,149.70-18,935.74

Finding the Fourth Proportional to 78,100.06, 117,149.70 and 18,935.74

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Solution

The fourth proportional to 78,100.06, 117,149.70 and 18,935.74 is: 28,403.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,100.06 : 117,149.70 = 18,935.74 : x
  2. Step 2: Convert to fraction form
    78,100.06/117,149.70 = 18,935.74/x
  3. Step 3: Cross multiply
    78,100.06x = 117,149.70 × 18,935.74
  4. Step 4: Simplify right side
    78,100.06x = 2,218,315,674.53
  5. Step 5: Solve for x
    x = 2,218,315,674.53/78,100.06
  6. Step 6: Final answer
    x = 28,403.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.