Home / 156,739.14-215,808.36-138,323.40

Finding the Fourth Proportional to 156,739.14, 215,808.36 and 138,323.40

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Solution

The fourth proportional to 156,739.14, 215,808.36 and 138,323.40 is: 190,452.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,739.14 : 215,808.36 = 138,323.40 : x
  2. Step 2: Convert to fraction form
    156,739.14/215,808.36 = 138,323.40/x
  3. Step 3: Cross multiply
    156,739.14x = 215,808.36 × 138,323.40
  4. Step 4: Simplify right side
    156,739.14x = 29,851,346,103.62
  5. Step 5: Solve for x
    x = 29,851,346,103.62/156,739.14
  6. Step 6: Final answer
    x = 190,452.40

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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.