Home / 81,423,978.40-122,135,967.60-36,074,346.40

Finding the Fourth Proportional to 81,423,978.40, 122,135,967.60 and 36,074,346.40

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Solution

The fourth proportional to 81,423,978.40, 122,135,967.60 and 36,074,346.40 is: 54,111,519.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,423,978.40 : 122,135,967.60 = 36,074,346.40 : x
  2. Step 2: Convert to fraction form
    81,423,978.40/122,135,967.60 = 36,074,346.40/x
  3. Step 3: Cross multiply
    81,423,978.40x = 122,135,967.60 × 36,074,346.40
  4. Step 4: Simplify right side
    81,423,978.40x = 4,405,975,203,101,576
  5. Step 5: Solve for x
    x = 4,405,975,203,101,576/81,423,978.40
  6. Step 6: Final answer
    x = 54,111,519.60

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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.