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Finding the Fourth Proportional to 144,376.74, 216,028.72 and 90,818.60

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Solution

The fourth proportional to 144,376.74, 216,028.72 and 90,818.60 is: 135,890.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,376.74 : 216,028.72 = 90,818.60 : x
  2. Step 2: Convert to fraction form
    144,376.74/216,028.72 = 90,818.60/x
  3. Step 3: Cross multiply
    144,376.74x = 216,028.72 × 90,818.60
  4. Step 4: Simplify right side
    144,376.74x = 19,619,425,910.19
  5. Step 5: Solve for x
    x = 19,619,425,910.19/144,376.74
  6. Step 6: Final answer
    x = 135,890.49

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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.