Home / 85,901,865.12-128,872,980.36-28,394,138.16

Finding the Fourth Proportional to 85,901,865.12, 128,872,980.36 and 28,394,138.16

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Solution

The fourth proportional to 85,901,865.12, 128,872,980.36 and 28,394,138.16 is: 42,597,878.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,901,865.12 : 128,872,980.36 = 28,394,138.16 : x
  2. Step 2: Convert to fraction form
    85,901,865.12/128,872,980.36 = 28,394,138.16/x
  3. Step 3: Cross multiply
    85,901,865.12x = 128,872,980.36 × 28,394,138.16
  4. Step 4: Simplify right side
    85,901,865.12x = 3,659,237,209,432,806.50
  5. Step 5: Solve for x
    x = 3,659,237,209,432,806.50/85,901,865.12
  6. Step 6: Final answer
    x = 42,597,878.45

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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.