Home / 90,626,904.70-135,940,357.05-81,556,978.30

Finding the Fourth Proportional to 90,626,904.70, 135,940,357.05 and 81,556,978.30

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Solution

The fourth proportional to 90,626,904.70, 135,940,357.05 and 81,556,978.30 is: 122,335,467.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,626,904.70 : 135,940,357.05 = 81,556,978.30 : x
  2. Step 2: Convert to fraction form
    90,626,904.70/135,940,357.05 = 81,556,978.30/x
  3. Step 3: Cross multiply
    90,626,904.70x = 135,940,357.05 × 81,556,978.30
  4. Step 4: Simplify right side
    90,626,904.70x = 11,086,884,750,021,102
  5. Step 5: Solve for x
    x = 11,086,884,750,021,102/90,626,904.70
  6. Step 6: Final answer
    x = 122,335,467.45

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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.