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Finding the Fourth Proportional to 101,575.88, 140,128.19 and 65,777.42

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Solution

The fourth proportional to 101,575.88, 140,128.19 and 65,777.42 is: 90,742.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,575.88 : 140,128.19 = 65,777.42 : x
  2. Step 2: Convert to fraction form
    101,575.88/140,128.19 = 65,777.42/x
  3. Step 3: Cross multiply
    101,575.88x = 140,128.19 × 65,777.42
  4. Step 4: Simplify right side
    101,575.88x = 9,217,271,075.57
  5. Step 5: Solve for x
    x = 9,217,271,075.57/101,575.88
  6. Step 6: Final answer
    x = 90,742.72

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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.