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Finding the Fourth Proportional to 28,581,659.80, 42,872,489.70 and 28,083,995.80

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Solution

The fourth proportional to 28,581,659.80, 42,872,489.70 and 28,083,995.80 is: 42,125,993.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,581,659.80 : 42,872,489.70 = 28,083,995.80 : x
  2. Step 2: Convert to fraction form
    28,581,659.80/42,872,489.70 = 28,083,995.80/x
  3. Step 3: Cross multiply
    28,581,659.80x = 42,872,489.70 × 28,083,995.80
  4. Step 4: Simplify right side
    28,581,659.80x = 1,204,030,820,670,343.50
  5. Step 5: Solve for x
    x = 1,204,030,820,670,343.50/28,581,659.80
  6. Step 6: Final answer
    x = 42,125,993.70

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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.