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Finding the Fourth Proportional to 308,720.10, 463,080.15 and 87,104.10

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Solution

The fourth proportional to 308,720.10, 463,080.15 and 87,104.10 is: 130,656.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,720.10 : 463,080.15 = 87,104.10 : x
  2. Step 2: Convert to fraction form
    308,720.10/463,080.15 = 87,104.10/x
  3. Step 3: Cross multiply
    308,720.10x = 463,080.15 × 87,104.10
  4. Step 4: Simplify right side
    308,720.10x = 40,336,179,693.62
  5. Step 5: Solve for x
    x = 40,336,179,693.62/308,720.10
  6. Step 6: Final answer
    x = 130,656.15

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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.