Home / 386,122.59-579,175.52-105,639.84

Finding the Fourth Proportional to 386,122.59, 579,175.52 and 105,639.84

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Solution

The fourth proportional to 386,122.59, 579,175.52 and 105,639.84 is: 158,457.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,122.59 : 579,175.52 = 105,639.84 : x
  2. Step 2: Convert to fraction form
    386,122.59/579,175.52 = 105,639.84/x
  3. Step 3: Cross multiply
    386,122.59x = 579,175.52 × 105,639.84
  4. Step 4: Simplify right side
    386,122.59x = 61,184,008,736.52
  5. Step 5: Solve for x
    x = 61,184,008,736.52/386,122.59
  6. Step 6: Final answer
    x = 158,457.47

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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.