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Finding the Fourth Proportional to 258,376.64, 387,742.08 and 100,605.92

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Solution

The fourth proportional to 258,376.64, 387,742.08 and 100,605.92 is: 150,977.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,376.64 : 387,742.08 = 100,605.92 : x
  2. Step 2: Convert to fraction form
    258,376.64/387,742.08 = 100,605.92/x
  3. Step 3: Cross multiply
    258,376.64x = 387,742.08 × 100,605.92
  4. Step 4: Simplify right side
    258,376.64x = 39,009,148,681.11
  5. Step 5: Solve for x
    x = 39,009,148,681.11/258,376.64
  6. Step 6: Final answer
    x = 150,977.85

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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.