Home / 85,957,228.80-128,935,843.20-28,455,312.60

Finding the Fourth Proportional to 85,957,228.80, 128,935,843.20 and 28,455,312.60

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Solution

The fourth proportional to 85,957,228.80, 128,935,843.20 and 28,455,312.60 is: 42,682,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,957,228.80 : 128,935,843.20 = 28,455,312.60 : x
  2. Step 2: Convert to fraction form
    85,957,228.80/128,935,843.20 = 28,455,312.60/x
  3. Step 3: Cross multiply
    85,957,228.80x = 128,935,843.20 × 28,455,312.60
  4. Step 4: Simplify right side
    85,957,228.80x = 3,668,909,723,600,584.50
  5. Step 5: Solve for x
    x = 3,668,909,723,600,584.50/85,957,228.80
  6. Step 6: Final answer
    x = 42,682,968.90

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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.