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Finding the Fourth Proportional to 69,975.99, 104,959.67 and 28,421.91

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Solution

The fourth proportional to 69,975.99, 104,959.67 and 28,421.91 is: 42,631.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,975.99 : 104,959.67 = 28,421.91 : x
  2. Step 2: Convert to fraction form
    69,975.99/104,959.67 = 28,421.91/x
  3. Step 3: Cross multiply
    69,975.99x = 104,959.67 × 28,421.91
  4. Step 4: Simplify right side
    69,975.99x = 2,983,154,152.26
  5. Step 5: Solve for x
    x = 2,983,154,152.26/69,975.99
  6. Step 6: Final answer
    x = 42,631.11

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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.