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Finding the Fourth Proportional to 208,728.81, 288,045.80 and 118,082.90

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Solution

The fourth proportional to 208,728.81, 288,045.80 and 118,082.90 is: 162,954.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,728.81 : 288,045.80 = 118,082.90 : x
  2. Step 2: Convert to fraction form
    208,728.81/288,045.80 = 118,082.90/x
  3. Step 3: Cross multiply
    208,728.81x = 288,045.80 × 118,082.90
  4. Step 4: Simplify right side
    208,728.81x = 34,013,283,396.82
  5. Step 5: Solve for x
    x = 34,013,283,396.82/208,728.81
  6. Step 6: Final answer
    x = 162,954.43

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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.