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Finding the Fourth Proportional to 170,717.30, 256,075.95 and 91,985.30

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Solution

The fourth proportional to 170,717.30, 256,075.95 and 91,985.30 is: 137,977.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,717.30 : 256,075.95 = 91,985.30 : x
  2. Step 2: Convert to fraction form
    170,717.30/256,075.95 = 91,985.30/x
  3. Step 3: Cross multiply
    170,717.30x = 256,075.95 × 91,985.30
  4. Step 4: Simplify right side
    170,717.30x = 23,555,223,083.54
  5. Step 5: Solve for x
    x = 23,555,223,083.54/170,717.30
  6. Step 6: Final answer
    x = 137,977.95

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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.