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Finding the Fourth Proportional to 261,783.59, 392,312.09 and 119,280.60

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Solution

The fourth proportional to 261,783.59, 392,312.09 and 119,280.60 is: 178,755.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,783.59 : 392,312.09 = 119,280.60 : x
  2. Step 2: Convert to fraction form
    261,783.59/392,312.09 = 119,280.60/x
  3. Step 3: Cross multiply
    261,783.59x = 392,312.09 × 119,280.60
  4. Step 4: Simplify right side
    261,783.59x = 46,795,220,886.05
  5. Step 5: Solve for x
    x = 46,795,220,886.05/261,783.59
  6. Step 6: Final answer
    x = 178,755.37

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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.