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Finding the Fourth Proportional to 144,379.26, 216,485.76 and 55,621.20

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Solution

The fourth proportional to 144,379.26, 216,485.76 and 55,621.20 is: 83,399.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,379.26 : 216,485.76 = 55,621.20 : x
  2. Step 2: Convert to fraction form
    144,379.26/216,485.76 = 55,621.20/x
  3. Step 3: Cross multiply
    144,379.26x = 216,485.76 × 55,621.20
  4. Step 4: Simplify right side
    144,379.26x = 12,041,197,754.11
  5. Step 5: Solve for x
    x = 12,041,197,754.11/144,379.26
  6. Step 6: Final answer
    x = 83,399.77

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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.