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Finding the Fourth Proportional to 255,699.17, 383,487.23 and 78,207.71

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Solution

The fourth proportional to 255,699.17, 383,487.23 and 78,207.71 is: 117,292.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,699.17 : 383,487.23 = 78,207.71 : x
  2. Step 2: Convert to fraction form
    255,699.17/383,487.23 = 78,207.71/x
  3. Step 3: Cross multiply
    255,699.17x = 383,487.23 × 78,207.71
  4. Step 4: Simplify right side
    255,699.17x = 29,991,657,681.50
  5. Step 5: Solve for x
    x = 29,991,657,681.50/255,699.17
  6. Step 6: Final answer
    x = 117,292.75

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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.