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Finding the Fourth Proportional to 57,615.75, 79,509.74 and 31,119.75

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Solution

The fourth proportional to 57,615.75, 79,509.74 and 31,119.75 is: 42,945.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,615.75 : 79,509.74 = 31,119.75 : x
  2. Step 2: Convert to fraction form
    57,615.75/79,509.74 = 31,119.75/x
  3. Step 3: Cross multiply
    57,615.75x = 79,509.74 × 31,119.75
  4. Step 4: Simplify right side
    57,615.75x = 2,474,323,075.77
  5. Step 5: Solve for x
    x = 2,474,323,075.77/57,615.75
  6. Step 6: Final answer
    x = 42,945.26

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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.