Home / 85,843,871.28-128,765,841.72-21,148,936.08

Finding the Fourth Proportional to 85,843,871.28, 128,765,841.72 and 21,148,936.08

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Solution

The fourth proportional to 85,843,871.28, 128,765,841.72 and 21,148,936.08 is: 31,723,412.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,843,871.28 : 128,765,841.72 = 21,148,936.08 : x
  2. Step 2: Convert to fraction form
    85,843,871.28/128,765,841.72 = 21,148,936.08/x
  3. Step 3: Cross multiply
    85,843,871.28x = 128,765,841.72 × 21,148,936.08
  4. Step 4: Simplify right side
    85,843,871.28x = 2,723,260,555,823,677
  5. Step 5: Solve for x
    x = 2,723,260,555,823,677/85,843,871.28
  6. Step 6: Final answer
    x = 31,723,412.69

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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.