Home / 85,542,001.20-128,029,566.60-78,739,556.40

Finding the Fourth Proportional to 85,542,001.20, 128,029,566.60 and 78,739,556.40

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Solution

The fourth proportional to 85,542,001.20, 128,029,566.60 and 78,739,556.40 is: 117,848,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,542,001.20 : 128,029,566.60 = 78,739,556.40 : x
  2. Step 2: Convert to fraction form
    85,542,001.20/128,029,566.60 = 78,739,556.40/x
  3. Step 3: Cross multiply
    85,542,001.20x = 128,029,566.60 × 78,739,556.40
  4. Step 4: Simplify right side
    85,542,001.20x = 10,080,991,280,168,256
  5. Step 5: Solve for x
    x = 10,080,991,280,168,256/85,542,001.20
  6. Step 6: Final answer
    x = 117,848,438.65

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1.5x scale

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.