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Finding the Fourth Proportional to 64,891.69, 97,290.80 and 39,880.07

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Solution

The fourth proportional to 64,891.69, 97,290.80 and 39,880.07 is: 59,791.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,891.69 : 97,290.80 = 39,880.07 : x
  2. Step 2: Convert to fraction form
    64,891.69/97,290.80 = 39,880.07/x
  3. Step 3: Cross multiply
    64,891.69x = 97,290.80 × 39,880.07
  4. Step 4: Simplify right side
    64,891.69x = 3,879,963,914.36
  5. Step 5: Solve for x
    x = 3,879,963,914.36/64,891.69
  6. Step 6: Final answer
    x = 59,791.38

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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.