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Finding the Fourth Proportional to 143,572, 215,366.64 and 45,076

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Solution

The fourth proportional to 143,572, 215,366.64 and 45,076 is: 67,616.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,572 : 215,366.64 = 45,076 : x
  2. Step 2: Convert to fraction form
    143,572/215,366.64 = 45,076/x
  3. Step 3: Cross multiply
    143,572x = 215,366.64 × 45,076
  4. Step 4: Simplify right side
    143,572x = 9,707,866,664.64
  5. Step 5: Solve for x
    x = 9,707,866,664.64/143,572
  6. Step 6: Final answer
    x = 67,616.71

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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.