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Finding the Fourth Proportional to 86,709, 130,060.60 and 36,756.96

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Solution

The fourth proportional to 86,709, 130,060.60 and 36,756.96 is: 55,134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,709 : 130,060.60 = 36,756.96 : x
  2. Step 2: Convert to fraction form
    86,709/130,060.60 = 36,756.96/x
  3. Step 3: Cross multiply
    86,709x = 130,060.60 × 36,756.96
  4. Step 4: Simplify right side
    86,709x = 4,780,632,271.78
  5. Step 5: Solve for x
    x = 4,780,632,271.78/86,709
  6. Step 6: Final answer
    x = 55,134.21

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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.