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Finding the Fourth Proportional to 145,998.69, 218,892.86 and 89,722.47

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Solution

The fourth proportional to 145,998.69, 218,892.86 and 89,722.47 is: 134,519.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,998.69 : 218,892.86 = 89,722.47 : x
  2. Step 2: Convert to fraction form
    145,998.69/218,892.86 = 89,722.47/x
  3. Step 3: Cross multiply
    145,998.69x = 218,892.86 × 89,722.47
  4. Step 4: Simplify right side
    145,998.69x = 19,639,607,615.95
  5. Step 5: Solve for x
    x = 19,639,607,615.95/145,998.69
  6. Step 6: Final answer
    x = 134,519.07

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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.