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Finding the Fourth Proportional to 357,087.36, 535,632.80 and 120,432.09

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Solution

The fourth proportional to 357,087.36, 535,632.80 and 120,432.09 is: 180,648.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,087.36 : 535,632.80 = 120,432.09 : x
  2. Step 2: Convert to fraction form
    357,087.36/535,632.80 = 120,432.09/x
  3. Step 3: Cross multiply
    357,087.36x = 535,632.80 × 120,432.09
  4. Step 4: Simplify right side
    357,087.36x = 64,507,376,974.39
  5. Step 5: Solve for x
    x = 64,507,376,974.39/357,087.36
  6. Step 6: Final answer
    x = 180,648.73

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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.