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Finding the Fourth Proportional to 64,541, 89,075.20 and 39,067.92

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Solution

The fourth proportional to 64,541, 89,075.20 and 39,067.92 is: 53,918.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,541 : 89,075.20 = 39,067.92 : x
  2. Step 2: Convert to fraction form
    64,541/89,075.20 = 39,067.92/x
  3. Step 3: Cross multiply
    64,541x = 89,075.20 × 39,067.92
  4. Step 4: Simplify right side
    64,541x = 3,479,982,787.58
  5. Step 5: Solve for x
    x = 3,479,982,787.58/64,541
  6. Step 6: Final answer
    x = 53,918.95

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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.