Home / 86,977.49-119,129.58-81,870.84

Finding the Fourth Proportional to 86,977.49, 119,129.58 and 81,870.84

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Solution

The fourth proportional to 86,977.49, 119,129.58 and 81,870.84 is: 112,135.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,977.49 : 119,129.58 = 81,870.84 : x
  2. Step 2: Convert to fraction form
    86,977.49/119,129.58 = 81,870.84/x
  3. Step 3: Cross multiply
    86,977.49x = 119,129.58 × 81,870.84
  4. Step 4: Simplify right side
    86,977.49x = 9,753,238,783.45
  5. Step 5: Solve for x
    x = 9,753,238,783.45/86,977.49
  6. Step 6: Final answer
    x = 112,135.21

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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.