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Finding the Fourth Proportional to 78,067,398.90, 107,733,652.32 and 43,260,670.62

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Solution

The fourth proportional to 78,067,398.90, 107,733,652.32 and 43,260,670.62 is: 59,700,081.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,067,398.90 : 107,733,652.32 = 43,260,670.62 : x
  2. Step 2: Convert to fraction form
    78,067,398.90/107,733,652.32 = 43,260,670.62/x
  3. Step 3: Cross multiply
    78,067,398.90x = 107,733,652.32 × 43,260,670.62
  4. Step 4: Simplify right side
    78,067,398.90x = 4,660,630,047,705,118
  5. Step 5: Solve for x
    x = 4,660,630,047,705,118/78,067,398.90
  6. Step 6: Final answer
    x = 59,700,081.13

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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.