Home / 77,075.73-115,615.99-20,915.62

Finding the Fourth Proportional to 77,075.73, 115,615.99 and 20,915.62

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Solution

The fourth proportional to 77,075.73, 115,615.99 and 20,915.62 is: 31,374.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,075.73 : 115,615.99 = 20,915.62 : x
  2. Step 2: Convert to fraction form
    77,075.73/115,615.99 = 20,915.62/x
  3. Step 3: Cross multiply
    77,075.73x = 115,615.99 × 20,915.62
  4. Step 4: Simplify right side
    77,075.73x = 2,418,180,112.76
  5. Step 5: Solve for x
    x = 2,418,180,112.76/77,075.73
  6. Step 6: Final answer
    x = 31,374.08

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1.5x scale

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.