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Finding the Fourth Proportional to 143,572.65, 215,389.73 and 43,740.88

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Solution

The fourth proportional to 143,572.65, 215,389.73 and 43,740.88 is: 65,620.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,572.65 : 215,389.73 = 43,740.88 : x
  2. Step 2: Convert to fraction form
    143,572.65/215,389.73 = 43,740.88/x
  3. Step 3: Cross multiply
    143,572.65x = 215,389.73 × 43,740.88
  4. Step 4: Simplify right side
    143,572.65x = 9,421,336,333.16
  5. Step 5: Solve for x
    x = 9,421,336,333.16/143,572.65
  6. Step 6: Final answer
    x = 65,620.69

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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.