Home / 286,640.20-429,970.04-76,278.36

Finding the Fourth Proportional to 286,640.20, 429,970.04 and 76,278.36

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Solution

The fourth proportional to 286,640.20, 429,970.04 and 76,278.36 is: 114,420.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,640.20 : 429,970.04 = 76,278.36 : x
  2. Step 2: Convert to fraction form
    286,640.20/429,970.04 = 76,278.36/x
  3. Step 3: Cross multiply
    286,640.20x = 429,970.04 × 76,278.36
  4. Step 4: Simplify right side
    286,640.20x = 32,797,409,500.33
  5. Step 5: Solve for x
    x = 32,797,409,500.33/286,640.20
  6. Step 6: Final answer
    x = 114,420.13

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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.