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Finding the Fourth Proportional to 64,408,057.20, 96,584,092.20 and 21,260,588.40

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Solution

The fourth proportional to 64,408,057.20, 96,584,092.20 and 21,260,588.40 is: 31,881,642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,408,057.20 : 96,584,092.20 = 21,260,588.40 : x
  2. Step 2: Convert to fraction form
    64,408,057.20/96,584,092.20 = 21,260,588.40/x
  3. Step 3: Cross multiply
    64,408,057.20x = 96,584,092.20 × 21,260,588.40
  4. Step 4: Simplify right side
    64,408,057.20x = 2,053,434,630,251,850.50
  5. Step 5: Solve for x
    x = 2,053,434,630,251,850.50/64,408,057.20
  6. Step 6: Final answer
    x = 31,881,642.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.