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Finding the Fourth Proportional to 142,643.85, 213,965.57 and 42,803.88

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Solution

The fourth proportional to 142,643.85, 213,965.57 and 42,803.88 is: 64,205.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,643.85 : 213,965.57 = 42,803.88 : x
  2. Step 2: Convert to fraction form
    142,643.85/213,965.57 = 42,803.88/x
  3. Step 3: Cross multiply
    142,643.85x = 213,965.57 × 42,803.88
  4. Step 4: Simplify right side
    142,643.85x = 9,158,556,689.42
  5. Step 5: Solve for x
    x = 9,158,556,689.42/142,643.85
  6. Step 6: Final answer
    x = 64,205.76

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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.