Home / 80,933,426.30-121,400,139.45-72,430,370.30

Finding the Fourth Proportional to 80,933,426.30, 121,400,139.45 and 72,430,370.30

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Solution

The fourth proportional to 80,933,426.30, 121,400,139.45 and 72,430,370.30 is: 108,645,555.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,933,426.30 : 121,400,139.45 = 72,430,370.30 : x
  2. Step 2: Convert to fraction form
    80,933,426.30/121,400,139.45 = 72,430,370.30/x
  3. Step 3: Cross multiply
    80,933,426.30x = 121,400,139.45 × 72,430,370.30
  4. Step 4: Simplify right side
    80,933,426.30x = 8,793,057,054,835,138
  5. Step 5: Solve for x
    x = 8,793,057,054,835,138/80,933,426.30
  6. Step 6: Final answer
    x = 108,645,555.45

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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.