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Finding the Fourth Proportional to 144,893.60, 216,879.60 and 103,421.60

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Solution

The fourth proportional to 144,893.60, 216,879.60 and 103,421.60 is: 154,803.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,893.60 : 216,879.60 = 103,421.60 : x
  2. Step 2: Convert to fraction form
    144,893.60/216,879.60 = 103,421.60/x
  3. Step 3: Cross multiply
    144,893.60x = 216,879.60 × 103,421.60
  4. Step 4: Simplify right side
    144,893.60x = 22,430,035,239.36
  5. Step 5: Solve for x
    x = 22,430,035,239.36/144,893.60
  6. Step 6: Final answer
    x = 154,803.49

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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.