Home / 311,695,011.79-430,139,620.16-172,471,641.55

Finding the Fourth Proportional to 311,695,011.79, 430,139,620.16 and 172,471,641.55

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Solution

The fourth proportional to 311,695,011.79, 430,139,620.16 and 172,471,641.55 is: 238,011,144.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,695,011.79 : 430,139,620.16 = 172,471,641.55 : x
  2. Step 2: Convert to fraction form
    311,695,011.79/430,139,620.16 = 172,471,641.55/x
  3. Step 3: Cross multiply
    311,695,011.79x = 430,139,620.16 × 172,471,641.55
  4. Step 4: Simplify right side
    311,695,011.79x = 74,186,886,383,826,320
  5. Step 5: Solve for x
    x = 74,186,886,383,826,320/311,695,011.79
  6. Step 6: Final answer
    x = 238,011,144.16

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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.