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Finding the Fourth Proportional to 145,447.60, 217,998.60 and 61,207.60

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Solution

The fourth proportional to 145,447.60, 217,998.60 and 61,207.60 is: 91,738.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,447.60 : 217,998.60 = 61,207.60 : x
  2. Step 2: Convert to fraction form
    145,447.60/217,998.60 = 61,207.60/x
  3. Step 3: Cross multiply
    145,447.60x = 217,998.60 × 61,207.60
  4. Step 4: Simplify right side
    145,447.60x = 13,343,171,109.36
  5. Step 5: Solve for x
    x = 13,343,171,109.36/145,447.60
  6. Step 6: Final answer
    x = 91,738.68

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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.