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Finding the Fourth Proportional to 143,695.85, 215,543.77 and 43,856.57

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Solution

The fourth proportional to 143,695.85, 215,543.77 and 43,856.57 is: 65,784.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,695.85 : 215,543.77 = 43,856.57 : x
  2. Step 2: Convert to fraction form
    143,695.85/215,543.77 = 43,856.57/x
  3. Step 3: Cross multiply
    143,695.85x = 215,543.77 × 43,856.57
  4. Step 4: Simplify right side
    143,695.85x = 9,453,010,866.29
  5. Step 5: Solve for x
    x = 9,453,010,866.29/143,695.85
  6. Step 6: Final answer
    x = 65,784.86

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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.