Home / 426,209.12-639,234.48-141,904.16

Finding the Fourth Proportional to 426,209.12, 639,234.48 and 141,904.16

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Solution

The fourth proportional to 426,209.12, 639,234.48 and 141,904.16 is: 212,829.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,209.12 : 639,234.48 = 141,904.16 : x
  2. Step 2: Convert to fraction form
    426,209.12/639,234.48 = 141,904.16/x
  3. Step 3: Cross multiply
    426,209.12x = 639,234.48 × 141,904.16
  4. Step 4: Simplify right side
    426,209.12x = 90,710,031,927.44
  5. Step 5: Solve for x
    x = 90,710,031,927.44/426,209.12
  6. Step 6: Final answer
    x = 212,829.87

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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.