Home / 121,983,420.84-168,337,121.64-66,979,277.32

Finding the Fourth Proportional to 121,983,420.84, 168,337,121.64 and 66,979,277.32

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Solution

The fourth proportional to 121,983,420.84, 168,337,121.64 and 66,979,277.32 is: 92,431,403.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,983,420.84 : 168,337,121.64 = 66,979,277.32 : x
  2. Step 2: Convert to fraction form
    121,983,420.84/168,337,121.64 = 66,979,277.32/x
  3. Step 3: Cross multiply
    121,983,420.84x = 168,337,121.64 × 66,979,277.32
  4. Step 4: Simplify right side
    121,983,420.84x = 11,275,098,753,576,132
  5. Step 5: Solve for x
    x = 11,275,098,753,576,132/121,983,420.84
  6. Step 6: Final answer
    x = 92,431,403.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.