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Finding the Fourth Proportional to 81,653,997.60, 122,480,996.40 and 54,444,218.40

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Solution

The fourth proportional to 81,653,997.60, 122,480,996.40 and 54,444,218.40 is: 81,666,327.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,653,997.60 : 122,480,996.40 = 54,444,218.40 : x
  2. Step 2: Convert to fraction form
    81,653,997.60/122,480,996.40 = 54,444,218.40/x
  3. Step 3: Cross multiply
    81,653,997.60x = 122,480,996.40 × 54,444,218.40
  4. Step 4: Simplify right side
    81,653,997.60x = 6,668,382,117,851,214
  5. Step 5: Solve for x
    x = 6,668,382,117,851,214/81,653,997.60
  6. Step 6: Final answer
    x = 81,666,327.60

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1.5x scale

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.