Home / 156,643.16-216,161.75-85,021.65

Finding the Fourth Proportional to 156,643.16, 216,161.75 and 85,021.65

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Solution

The fourth proportional to 156,643.16, 216,161.75 and 85,021.65 is: 117,326.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,643.16 : 216,161.75 = 85,021.65 : x
  2. Step 2: Convert to fraction form
    156,643.16/216,161.75 = 85,021.65/x
  3. Step 3: Cross multiply
    156,643.16x = 216,161.75 × 85,021.65
  4. Step 4: Simplify right side
    156,643.16x = 18,378,428,226.78
  5. Step 5: Solve for x
    x = 18,378,428,226.78/156,643.16
  6. Step 6: Final answer
    x = 117,326.72

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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.