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Finding the Fourth Proportional to 171,985.65, 257,860.70 and 87,582.43

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Solution

The fourth proportional to 171,985.65, 257,860.70 and 87,582.43 is: 131,313.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,985.65 : 257,860.70 = 87,582.43 : x
  2. Step 2: Convert to fraction form
    171,985.65/257,860.70 = 87,582.43/x
  3. Step 3: Cross multiply
    171,985.65x = 257,860.70 × 87,582.43
  4. Step 4: Simplify right side
    171,985.65x = 22,584,066,707.50
  5. Step 5: Solve for x
    x = 22,584,066,707.50/171,985.65
  6. Step 6: Final answer
    x = 131,313.67

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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.