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Finding the Fourth Proportional to 313,690,635.93, 432,890,684.91 and 172,558,818.41

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Solution

The fourth proportional to 313,690,635.93, 432,890,684.91 and 172,558,818.41 is: 238,129,853.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,690,635.93 : 432,890,684.91 = 172,558,818.41 : x
  2. Step 2: Convert to fraction form
    313,690,635.93/432,890,684.91 = 172,558,818.41/x
  3. Step 3: Cross multiply
    313,690,635.93x = 432,890,684.91 × 172,558,818.41
  4. Step 4: Simplify right side
    313,690,635.93x = 74,699,105,088,765,216
  5. Step 5: Solve for x
    x = 74,699,105,088,765,216/313,690,635.93
  6. Step 6: Final answer
    x = 238,129,853.21

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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.