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Finding the Fourth Proportional to 258,075.72, 387,047.84 and 80,600.67

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Solution

The fourth proportional to 258,075.72, 387,047.84 and 80,600.67 is: 120,880.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,075.72 : 387,047.84 = 80,600.67 : x
  2. Step 2: Convert to fraction form
    258,075.72/387,047.84 = 80,600.67/x
  3. Step 3: Cross multiply
    258,075.72x = 387,047.84 × 80,600.67
  4. Step 4: Simplify right side
    258,075.72x = 31,196,314,823.05
  5. Step 5: Solve for x
    x = 31,196,314,823.05/258,075.72
  6. Step 6: Final answer
    x = 120,880.47

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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.