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Finding the Fourth Proportional to 318,954,118, 440,156,994.96 and 172,276,402

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Solution

The fourth proportional to 318,954,118, 440,156,994.96 and 172,276,402 is: 237,741,603.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,954,118 : 440,156,994.96 = 172,276,402 : x
  2. Step 2: Convert to fraction form
    318,954,118/440,156,994.96 = 172,276,402/x
  3. Step 3: Cross multiply
    318,954,118x = 440,156,994.96 × 172,276,402
  4. Step 4: Simplify right side
    318,954,118x = 75,828,663,406,840,928
  5. Step 5: Solve for x
    x = 75,828,663,406,840,928/318,954,118
  6. Step 6: Final answer
    x = 237,741,603.35

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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.