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Finding the Fourth Proportional to 140,986, 211,479 and 42,490

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Solution

The fourth proportional to 140,986, 211,479 and 42,490 is: 63,735

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,986 : 211,479 = 42,490 : x
  2. Step 2: Convert to fraction form
    140,986/211,479 = 42,490/x
  3. Step 3: Cross multiply
    140,986x = 211,479 × 42,490
  4. Step 4: Simplify right side
    140,986x = 8,985,742,710
  5. Step 5: Solve for x
    x = 8,985,742,710/140,986
  6. Step 6: Final answer
    x = 63,735

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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.