Home / 156,643.09-216,161.66-85,021.58

Finding the Fourth Proportional to 156,643.09, 216,161.66 and 85,021.58

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Solution

The fourth proportional to 156,643.09, 216,161.66 and 85,021.58 is: 117,326.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,643.09 : 216,161.66 = 85,021.58 : x
  2. Step 2: Convert to fraction form
    156,643.09/216,161.66 = 85,021.58/x
  3. Step 3: Cross multiply
    156,643.09x = 216,161.66 × 85,021.58
  4. Step 4: Simplify right side
    156,643.09x = 18,378,406,621.58
  5. Step 5: Solve for x
    x = 18,378,406,621.58/156,643.09
  6. Step 6: Final answer
    x = 117,326.64

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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.