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Finding the Fourth Proportional to 143,670.55, 215,430.90 and 53,639.14

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Solution

The fourth proportional to 143,670.55, 215,430.90 and 53,639.14 is: 80,430.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,670.55 : 215,430.90 = 53,639.14 : x
  2. Step 2: Convert to fraction form
    143,670.55/215,430.90 = 53,639.14/x
  3. Step 3: Cross multiply
    143,670.55x = 215,430.90 × 53,639.14
  4. Step 4: Simplify right side
    143,670.55x = 11,555,528,205.43
  5. Step 5: Solve for x
    x = 11,555,528,205.43/143,670.55
  6. Step 6: Final answer
    x = 80,430.74

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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.