Home / 80,557,320.40-120,835,980.60-72,495,163.60

Finding the Fourth Proportional to 80,557,320.40, 120,835,980.60 and 72,495,163.60

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Solution

The fourth proportional to 80,557,320.40, 120,835,980.60 and 72,495,163.60 is: 108,742,745.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,557,320.40 : 120,835,980.60 = 72,495,163.60 : x
  2. Step 2: Convert to fraction form
    80,557,320.40/120,835,980.60 = 72,495,163.60/x
  3. Step 3: Cross multiply
    80,557,320.40x = 120,835,980.60 × 72,495,163.60
  4. Step 4: Simplify right side
    80,557,320.40x = 8,760,024,182,363,425
  5. Step 5: Solve for x
    x = 8,760,024,182,363,425/80,557,320.40
  6. Step 6: Final answer
    x = 108,742,745.40

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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.