Home / 91,222.20-125,403.39-78,428.25

Finding the Fourth Proportional to 91,222.20, 125,403.39 and 78,428.25

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Solution

The fourth proportional to 91,222.20, 125,403.39 and 78,428.25 is: 107,815.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,222.20 : 125,403.39 = 78,428.25 : x
  2. Step 2: Convert to fraction form
    91,222.20/125,403.39 = 78,428.25/x
  3. Step 3: Cross multiply
    91,222.20x = 125,403.39 × 78,428.25
  4. Step 4: Simplify right side
    91,222.20x = 9,835,168,421.77
  5. Step 5: Solve for x
    x = 9,835,168,421.77/91,222.20
  6. Step 6: Final answer
    x = 107,815.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.