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Finding the Fourth Proportional to 86,908.70, 130,365.48 and 30,740.87

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Solution

The fourth proportional to 86,908.70, 130,365.48 and 30,740.87 is: 46,112.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,908.70 : 130,365.48 = 30,740.87 : x
  2. Step 2: Convert to fraction form
    86,908.70/130,365.48 = 30,740.87/x
  3. Step 3: Cross multiply
    86,908.70x = 130,365.48 × 30,740.87
  4. Step 4: Simplify right side
    86,908.70x = 4,007,548,273.17
  5. Step 5: Solve for x
    x = 4,007,548,273.17/86,908.70
  6. Step 6: Final answer
    x = 46,112.16

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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.