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Finding the Fourth Proportional to 208,065.80, 287,129.66 and 117,451.20

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Solution

The fourth proportional to 208,065.80, 287,129.66 and 117,451.20 is: 162,082.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,065.80 : 287,129.66 = 117,451.20 : x
  2. Step 2: Convert to fraction form
    208,065.80/287,129.66 = 117,451.20/x
  3. Step 3: Cross multiply
    208,065.80x = 287,129.66 × 117,451.20
  4. Step 4: Simplify right side
    208,065.80x = 33,723,723,122.59
  5. Step 5: Solve for x
    x = 33,723,723,122.59/208,065.80
  6. Step 6: Final answer
    x = 162,082.01

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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.