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Finding the Fourth Proportional to 84,075.80, 126,113.40 and 27,920.16

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Solution

The fourth proportional to 84,075.80, 126,113.40 and 27,920.16 is: 41,880.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,075.80 : 126,113.40 = 27,920.16 : x
  2. Step 2: Convert to fraction form
    84,075.80/126,113.40 = 27,920.16/x
  3. Step 3: Cross multiply
    84,075.80x = 126,113.40 × 27,920.16
  4. Step 4: Simplify right side
    84,075.80x = 3,521,106,306.14
  5. Step 5: Solve for x
    x = 3,521,106,306.14/84,075.80
  6. Step 6: Final answer
    x = 41,880.14

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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.