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Finding the Fourth Proportional to 81,075.51, 111,636.51 and 73,472.36

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Solution

The fourth proportional to 81,075.51, 111,636.51 and 73,472.36 is: 101,167.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,075.51 : 111,636.51 = 73,472.36 : x
  2. Step 2: Convert to fraction form
    81,075.51/111,636.51 = 73,472.36/x
  3. Step 3: Cross multiply
    81,075.51x = 111,636.51 × 73,472.36
  4. Step 4: Simplify right side
    81,075.51x = 8,202,197,851.86
  5. Step 5: Solve for x
    x = 8,202,197,851.86/81,075.51
  6. Step 6: Final answer
    x = 101,167.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.