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Finding the Fourth Proportional to 143,643.48, 215,457.01 and 54,905.95

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Solution

The fourth proportional to 143,643.48, 215,457.01 and 54,905.95 is: 82,355.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,643.48 : 215,457.01 = 54,905.95 : x
  2. Step 2: Convert to fraction form
    143,643.48/215,457.01 = 54,905.95/x
  3. Step 3: Cross multiply
    143,643.48x = 215,457.01 × 54,905.95
  4. Step 4: Simplify right side
    143,643.48x = 11,829,872,259.11
  5. Step 5: Solve for x
    x = 11,829,872,259.11/143,643.48
  6. Step 6: Final answer
    x = 82,355.79

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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.