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Finding the Fourth Proportional to 143,588, 215,390.72 and 45,092

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Solution

The fourth proportional to 143,588, 215,390.72 and 45,092 is: 67,640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,588 : 215,390.72 = 45,092 : x
  2. Step 2: Convert to fraction form
    143,588/215,390.72 = 45,092/x
  3. Step 3: Cross multiply
    143,588x = 215,390.72 × 45,092
  4. Step 4: Simplify right side
    143,588x = 9,712,398,346.24
  5. Step 5: Solve for x
    x = 9,712,398,346.24/143,588
  6. Step 6: Final answer
    x = 67,640.74

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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.