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Finding the Fourth Proportional to 208,411.60, 312,617.40 and 97,819.60

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Solution

The fourth proportional to 208,411.60, 312,617.40 and 97,819.60 is: 146,729.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,411.60 : 312,617.40 = 97,819.60 : x
  2. Step 2: Convert to fraction form
    208,411.60/312,617.40 = 97,819.60/x
  3. Step 3: Cross multiply
    208,411.60x = 312,617.40 × 97,819.60
  4. Step 4: Simplify right side
    208,411.60x = 30,580,109,021.04
  5. Step 5: Solve for x
    x = 30,580,109,021.04/208,411.60
  6. Step 6: Final answer
    x = 146,729.40

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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.