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Finding the Fourth Proportional to 255,426.55, 383,171.64 and 86,933.93

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Solution

The fourth proportional to 255,426.55, 383,171.64 and 86,933.93 is: 130,411.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,426.55 : 383,171.64 = 86,933.93 : x
  2. Step 2: Convert to fraction form
    255,426.55/383,171.64 = 86,933.93/x
  3. Step 3: Cross multiply
    255,426.55x = 383,171.64 × 86,933.93
  4. Step 4: Simplify right side
    255,426.55x = 33,310,616,095.08
  5. Step 5: Solve for x
    x = 33,310,616,095.08/255,426.55
  6. Step 6: Final answer
    x = 130,411.72

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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.