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Finding the Fourth Proportional to 255,885.66, 383,817.45 and 87,421.02

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Solution

The fourth proportional to 255,885.66, 383,817.45 and 87,421.02 is: 131,127.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,885.66 : 383,817.45 = 87,421.02 : x
  2. Step 2: Convert to fraction form
    255,885.66/383,817.45 = 87,421.02/x
  3. Step 3: Cross multiply
    255,885.66x = 383,817.45 × 87,421.02
  4. Step 4: Simplify right side
    255,885.66x = 33,553,712,972.80
  5. Step 5: Solve for x
    x = 33,553,712,972.80/255,885.66
  6. Step 6: Final answer
    x = 131,127.76

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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.