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Finding the Fourth Proportional to 143,580.54, 215,405.04 and 72,328.08

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Solution

The fourth proportional to 143,580.54, 215,405.04 and 72,328.08 is: 108,509.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,580.54 : 215,405.04 = 72,328.08 : x
  2. Step 2: Convert to fraction form
    143,580.54/215,405.04 = 72,328.08/x
  3. Step 3: Cross multiply
    143,580.54x = 215,405.04 × 72,328.08
  4. Step 4: Simplify right side
    143,580.54x = 15,579,832,965.52
  5. Step 5: Solve for x
    x = 15,579,832,965.52/143,580.54
  6. Step 6: Final answer
    x = 108,509.36

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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.