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Finding the Fourth Proportional to 79,959.86, 119,878.14 and 30,038.90

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Solution

The fourth proportional to 79,959.86, 119,878.14 and 30,038.90 is: 45,035.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,959.86 : 119,878.14 = 30,038.90 : x
  2. Step 2: Convert to fraction form
    79,959.86/119,878.14 = 30,038.90/x
  3. Step 3: Cross multiply
    79,959.86x = 119,878.14 × 30,038.90
  4. Step 4: Simplify right side
    79,959.86x = 3,601,007,459.65
  5. Step 5: Solve for x
    x = 3,601,007,459.65/79,959.86
  6. Step 6: Final answer
    x = 45,035.19

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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.