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Finding the Fourth Proportional to 86,666.86, 130,019.73 and 28,968.44

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Solution

The fourth proportional to 86,666.86, 130,019.73 and 28,968.44 is: 43,459.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,666.86 : 130,019.73 = 28,968.44 : x
  2. Step 2: Convert to fraction form
    86,666.86/130,019.73 = 28,968.44/x
  3. Step 3: Cross multiply
    86,666.86x = 130,019.73 × 28,968.44
  4. Step 4: Simplify right side
    86,666.86x = 3,766,468,097.22
  5. Step 5: Solve for x
    x = 3,766,468,097.22/86,666.86
  6. Step 6: Final answer
    x = 43,459.15

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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.