Home / 289,258.38-433,843.02-78,912.72

Finding the Fourth Proportional to 289,258.38, 433,843.02 and 78,912.72

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Solution

The fourth proportional to 289,258.38, 433,843.02 and 78,912.72 is: 118,356.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,258.38 : 433,843.02 = 78,912.72 : x
  2. Step 2: Convert to fraction form
    289,258.38/433,843.02 = 78,912.72/x
  3. Step 3: Cross multiply
    289,258.38x = 433,843.02 × 78,912.72
  4. Step 4: Simplify right side
    289,258.38x = 34,235,732,761.21
  5. Step 5: Solve for x
    x = 34,235,732,761.21/289,258.38
  6. Step 6: Final answer
    x = 118,356.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.