Home / 316,153.12-436,285.16-172,912.72

Finding the Fourth Proportional to 316,153.12, 436,285.16 and 172,912.72

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Solution

The fourth proportional to 316,153.12, 436,285.16 and 172,912.72 is: 238,616.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,153.12 : 436,285.16 = 172,912.72 : x
  2. Step 2: Convert to fraction form
    316,153.12/436,285.16 = 172,912.72/x
  3. Step 3: Cross multiply
    316,153.12x = 436,285.16 × 172,912.72
  4. Step 4: Simplify right side
    316,153.12x = 75,439,253,711.24
  5. Step 5: Solve for x
    x = 75,439,253,711.24/316,153.12
  6. Step 6: Final answer
    x = 238,616.19

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1.5x scale

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.