Home / 86,939.20-130,117.20-76,441.60

Finding the Fourth Proportional to 86,939.20, 130,117.20 and 76,441.60

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Solution

The fourth proportional to 86,939.20, 130,117.20 and 76,441.60 is: 114,406.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,939.20 : 130,117.20 = 76,441.60 : x
  2. Step 2: Convert to fraction form
    86,939.20/130,117.20 = 76,441.60/x
  3. Step 3: Cross multiply
    86,939.20x = 130,117.20 × 76,441.60
  4. Step 4: Simplify right side
    86,939.20x = 9,946,366,955.52
  5. Step 5: Solve for x
    x = 9,946,366,955.52/86,939.20
  6. Step 6: Final answer
    x = 114,406.01

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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.