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Finding the Fourth Proportional to 143,670.62, 215,539.63 and 43,830.78

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Solution

The fourth proportional to 143,670.62, 215,539.63 and 43,830.78 is: 65,756.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,670.62 : 215,539.63 = 43,830.78 : x
  2. Step 2: Convert to fraction form
    143,670.62/215,539.63 = 43,830.78/x
  3. Step 3: Cross multiply
    143,670.62x = 215,539.63 × 43,830.78
  4. Step 4: Simplify right side
    143,670.62x = 9,447,270,103.81
  5. Step 5: Solve for x
    x = 9,447,270,103.81/143,670.62
  6. Step 6: Final answer
    x = 65,756.45

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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.