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Finding the Fourth Proportional to 69,880.95, 104,864.63 and 28,328.31

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Solution

The fourth proportional to 69,880.95, 104,864.63 and 28,328.31 is: 42,509.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,880.95 : 104,864.63 = 28,328.31 : x
  2. Step 2: Convert to fraction form
    69,880.95/104,864.63 = 28,328.31/x
  3. Step 3: Cross multiply
    69,880.95x = 104,864.63 × 28,328.31
  4. Step 4: Simplify right side
    69,880.95x = 2,970,637,605.03
  5. Step 5: Solve for x
    x = 2,970,637,605.03/69,880.95
  6. Step 6: Final answer
    x = 42,509.98

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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.