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Finding the Fourth Proportional to 309,154.86, 426,669.12 and 173,225.52

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Solution

The fourth proportional to 309,154.86, 426,669.12 and 173,225.52 is: 239,071.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,154.86 : 426,669.12 = 173,225.52 : x
  2. Step 2: Convert to fraction form
    309,154.86/426,669.12 = 173,225.52/x
  3. Step 3: Cross multiply
    309,154.86x = 426,669.12 × 173,225.52
  4. Step 4: Simplify right side
    309,154.86x = 73,909,980,179.94
  5. Step 5: Solve for x
    x = 73,909,980,179.94/309,154.86
  6. Step 6: Final answer
    x = 239,071.06

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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.