Home / 80,557,288.40-120,835,932.60-72,495,131.60

Finding the Fourth Proportional to 80,557,288.40, 120,835,932.60 and 72,495,131.60

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Solution

The fourth proportional to 80,557,288.40, 120,835,932.60 and 72,495,131.60 is: 108,742,697.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,557,288.40 : 120,835,932.60 = 72,495,131.60 : x
  2. Step 2: Convert to fraction form
    80,557,288.40/120,835,932.60 = 72,495,131.60/x
  3. Step 3: Cross multiply
    80,557,288.40x = 120,835,932.60 × 72,495,131.60
  4. Step 4: Simplify right side
    80,557,288.40x = 8,760,016,835,845,729
  5. Step 5: Solve for x
    x = 8,760,016,835,845,729/80,557,288.40
  6. Step 6: Final answer
    x = 108,742,697.40

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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.