Home / 76,678.28-105,813.43-43,137.80

Finding the Fourth Proportional to 76,678.28, 105,813.43 and 43,137.80

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Solution

The fourth proportional to 76,678.28, 105,813.43 and 43,137.80 is: 59,528.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,678.28 : 105,813.43 = 43,137.80 : x
  2. Step 2: Convert to fraction form
    76,678.28/105,813.43 = 43,137.80/x
  3. Step 3: Cross multiply
    76,678.28x = 105,813.43 × 43,137.80
  4. Step 4: Simplify right side
    76,678.28x = 4,564,557,943.74
  5. Step 5: Solve for x
    x = 4,564,557,943.74/76,678.28
  6. Step 6: Final answer
    x = 59,528.70

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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.