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Finding the Fourth Proportional to 86,964.40, 130,295.40 and 40,121.20

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Solution

The fourth proportional to 86,964.40, 130,295.40 and 40,121.20 is: 60,112.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,964.40 : 130,295.40 = 40,121.20 : x
  2. Step 2: Convert to fraction form
    86,964.40/130,295.40 = 40,121.20/x
  3. Step 3: Cross multiply
    86,964.40x = 130,295.40 × 40,121.20
  4. Step 4: Simplify right side
    86,964.40x = 5,227,607,802.48
  5. Step 5: Solve for x
    x = 5,227,607,802.48/86,964.40
  6. Step 6: Final answer
    x = 60,112.04

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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.