Home / 81,074.81-121,669.62-28,488.39

Finding the Fourth Proportional to 81,074.81, 121,669.62 and 28,488.39

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Solution

The fourth proportional to 81,074.81, 121,669.62 and 28,488.39 is: 42,752.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,074.81 : 121,669.62 = 28,488.39 : x
  2. Step 2: Convert to fraction form
    81,074.81/121,669.62 = 28,488.39/x
  3. Step 3: Cross multiply
    81,074.81x = 121,669.62 × 28,488.39
  4. Step 4: Simplify right side
    81,074.81x = 3,466,171,585.71
  5. Step 5: Solve for x
    x = 3,466,171,585.71/81,074.81
  6. Step 6: Final answer
    x = 42,752.76

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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.