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Finding the Fourth Proportional to 208,731.60, 312,636.60 and 84,008.40

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Solution

The fourth proportional to 208,731.60, 312,636.60 and 84,008.40 is: 125,827.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,731.60 : 312,636.60 = 84,008.40 : x
  2. Step 2: Convert to fraction form
    208,731.60/312,636.60 = 84,008.40/x
  3. Step 3: Cross multiply
    208,731.60x = 312,636.60 × 84,008.40
  4. Step 4: Simplify right side
    208,731.60x = 26,264,100,547.44
  5. Step 5: Solve for x
    x = 26,264,100,547.44/208,731.60
  6. Step 6: Final answer
    x = 125,827.14

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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.