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Finding the Fourth Proportional to 315,867.69, 473,731.95 and 91,179.32

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Solution

The fourth proportional to 315,867.69, 473,731.95 and 91,179.32 is: 136,748.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,867.69 : 473,731.95 = 91,179.32 : x
  2. Step 2: Convert to fraction form
    315,867.69/473,731.95 = 91,179.32/x
  3. Step 3: Cross multiply
    315,867.69x = 473,731.95 × 91,179.32
  4. Step 4: Simplify right side
    315,867.69x = 43,194,556,607.38
  5. Step 5: Solve for x
    x = 43,194,556,607.38/315,867.69
  6. Step 6: Final answer
    x = 136,748.89

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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.