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Finding the Fourth Proportional to 171,681.66, 257,415.87 and 71,719.36

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Solution

The fourth proportional to 171,681.66, 257,415.87 and 71,719.36 is: 107,534.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,681.66 : 257,415.87 = 71,719.36 : x
  2. Step 2: Convert to fraction form
    171,681.66/257,415.87 = 71,719.36/x
  3. Step 3: Cross multiply
    171,681.66x = 257,415.87 × 71,719.36
  4. Step 4: Simplify right side
    171,681.66x = 18,461,701,075.65
  5. Step 5: Solve for x
    x = 18,461,701,075.65/171,681.66
  6. Step 6: Final answer
    x = 107,534.50

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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.