Home / 316,152.12-436,283.78-172,911.72

Finding the Fourth Proportional to 316,152.12, 436,283.78 and 172,911.72

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Solution

The fourth proportional to 316,152.12, 436,283.78 and 172,911.72 is: 238,614.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,152.12 : 436,283.78 = 172,911.72 : x
  2. Step 2: Convert to fraction form
    316,152.12/436,283.78 = 172,911.72/x
  3. Step 3: Cross multiply
    316,152.12x = 436,283.78 × 172,911.72
  4. Step 4: Simplify right side
    316,152.12x = 75,438,578,807.90
  5. Step 5: Solve for x
    x = 75,438,578,807.90/316,152.12
  6. Step 6: Final answer
    x = 238,614.81

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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.