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Finding the Fourth Proportional to 64,372,509.60, 89,067,990.57 and 56,129,748.30

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Solution

The fourth proportional to 64,372,509.60, 89,067,990.57 and 56,129,748.30 is: 77,663,026.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,372,509.60 : 89,067,990.57 = 56,129,748.30 : x
  2. Step 2: Convert to fraction form
    64,372,509.60/89,067,990.57 = 56,129,748.30/x
  3. Step 3: Cross multiply
    64,372,509.60x = 89,067,990.57 × 56,129,748.30
  4. Step 4: Simplify right side
    64,372,509.60x = 4,999,363,892,280,873
  5. Step 5: Solve for x
    x = 4,999,363,892,280,873/64,372,509.60
  6. Step 6: Final answer
    x = 77,663,026.09

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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.