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Finding the Fourth Proportional to 208,551.60, 312,827.40 and 129,625.20

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Solution

The fourth proportional to 208,551.60, 312,827.40 and 129,625.20 is: 194,437.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,551.60 : 312,827.40 = 129,625.20 : x
  2. Step 2: Convert to fraction form
    208,551.60/312,827.40 = 129,625.20/x
  3. Step 3: Cross multiply
    208,551.60x = 312,827.40 × 129,625.20
  4. Step 4: Simplify right side
    208,551.60x = 40,550,314,290.48
  5. Step 5: Solve for x
    x = 40,550,314,290.48/208,551.60
  6. Step 6: Final answer
    x = 194,437.80

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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.