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Finding the Fourth Proportional to 144,430.40, 216,559.20 and 74,446.40

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Solution

The fourth proportional to 144,430.40, 216,559.20 and 74,446.40 is: 111,625.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,430.40 : 216,559.20 = 74,446.40 : x
  2. Step 2: Convert to fraction form
    144,430.40/216,559.20 = 74,446.40/x
  3. Step 3: Cross multiply
    144,430.40x = 216,559.20 × 74,446.40
  4. Step 4: Simplify right side
    144,430.40x = 16,122,052,826.88
  5. Step 5: Solve for x
    x = 16,122,052,826.88/144,430.40
  6. Step 6: Final answer
    x = 111,625.07

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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.