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Finding the Fourth Proportional to 386,379.32, 579,605.82 and 120,068.12

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Solution

The fourth proportional to 386,379.32, 579,605.82 and 120,068.12 is: 180,113.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,379.32 : 579,605.82 = 120,068.12 : x
  2. Step 2: Convert to fraction form
    386,379.32/579,605.82 = 120,068.12/x
  3. Step 3: Cross multiply
    386,379.32x = 579,605.82 × 120,068.12
  4. Step 4: Simplify right side
    386,379.32x = 69,592,181,148.46
  5. Step 5: Solve for x
    x = 69,592,181,148.46/386,379.32
  6. Step 6: Final answer
    x = 180,113.63

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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.