Home / 153,090.50-211,272.09-85,108.60

Finding the Fourth Proportional to 153,090.50, 211,272.09 and 85,108.60

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Solution

The fourth proportional to 153,090.50, 211,272.09 and 85,108.60 is: 117,453.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,090.50 : 211,272.09 = 85,108.60 : x
  2. Step 2: Convert to fraction form
    153,090.50/211,272.09 = 85,108.60/x
  3. Step 3: Cross multiply
    153,090.50x = 211,272.09 × 85,108.60
  4. Step 4: Simplify right side
    153,090.50x = 17,981,070,742.61
  5. Step 5: Solve for x
    x = 17,981,070,742.61/153,090.50
  6. Step 6: Final answer
    x = 117,453.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.