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Finding the Fourth Proportional to 240,860, 361,376.88 and 128,421.92

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Solution

The fourth proportional to 240,860, 361,376.88 and 128,421.92 is: 192,679.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,860 : 361,376.88 = 128,421.92 : x
  2. Step 2: Convert to fraction form
    240,860/361,376.88 = 128,421.92/x
  3. Step 3: Cross multiply
    240,860x = 361,376.88 × 128,421.92
  4. Step 4: Simplify right side
    240,860x = 46,408,712,773.21
  5. Step 5: Solve for x
    x = 46,408,712,773.21/240,860
  6. Step 6: Final answer
    x = 192,679.20

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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.