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Finding the Fourth Proportional to 261,043, 391,517.52 and 118,854.40

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Solution

The fourth proportional to 261,043, 391,517.52 and 118,854.40 is: 178,260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,043 : 391,517.52 = 118,854.40 : x
  2. Step 2: Convert to fraction form
    261,043/391,517.52 = 118,854.40/x
  3. Step 3: Cross multiply
    261,043x = 391,517.52 × 118,854.40
  4. Step 4: Simplify right side
    261,043x = 46,533,579,929.09
  5. Step 5: Solve for x
    x = 46,533,579,929.09/261,043
  6. Step 6: Final answer
    x = 178,260.21

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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.