Home / 80,933,694.30-121,400,541.45-72,430,638.30

Finding the Fourth Proportional to 80,933,694.30, 121,400,541.45 and 72,430,638.30

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Solution

The fourth proportional to 80,933,694.30, 121,400,541.45 and 72,430,638.30 is: 108,645,957.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,933,694.30 : 121,400,541.45 = 72,430,638.30 : x
  2. Step 2: Convert to fraction form
    80,933,694.30/121,400,541.45 = 72,430,638.30/x
  3. Step 3: Cross multiply
    80,933,694.30x = 121,400,541.45 × 72,430,638.30
  4. Step 4: Simplify right side
    80,933,694.30x = 8,793,118,707,189,107
  5. Step 5: Solve for x
    x = 8,793,118,707,189,107/80,933,694.30
  6. Step 6: Final answer
    x = 108,645,957.45

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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.