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Finding the Fourth Proportional to 153,103.50, 211,300.30 and 85,127.22

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Solution

The fourth proportional to 153,103.50, 211,300.30 and 85,127.22 is: 117,485.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,103.50 : 211,300.30 = 85,127.22 : x
  2. Step 2: Convert to fraction form
    153,103.50/211,300.30 = 85,127.22/x
  3. Step 3: Cross multiply
    153,103.50x = 211,300.30 × 85,127.22
  4. Step 4: Simplify right side
    153,103.50x = 17,987,405,854.85
  5. Step 5: Solve for x
    x = 17,987,405,854.85/153,103.50
  6. Step 6: Final answer
    x = 117,485.27

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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.