Home / 311,695,011.54-430,139,619.81-172,471,641.30

Finding the Fourth Proportional to 311,695,011.54, 430,139,619.81 and 172,471,641.30

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Solution

The fourth proportional to 311,695,011.54, 430,139,619.81 and 172,471,641.30 is: 238,011,143.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,695,011.54 : 430,139,619.81 = 172,471,641.30 : x
  2. Step 2: Convert to fraction form
    311,695,011.54/430,139,619.81 = 172,471,641.30/x
  3. Step 3: Cross multiply
    311,695,011.54x = 430,139,619.81 × 172,471,641.30
  4. Step 4: Simplify right side
    311,695,011.54x = 74,186,886,216,788,704
  5. Step 5: Solve for x
    x = 74,186,886,216,788,704/311,695,011.54
  6. Step 6: Final answer
    x = 238,011,143.81

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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.