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Finding the Fourth Proportional to 104,976,129.80, 157,464,194.70 and 66,806,856.20

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Solution

The fourth proportional to 104,976,129.80, 157,464,194.70 and 66,806,856.20 is: 100,210,284.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,976,129.80 : 157,464,194.70 = 66,806,856.20 : x
  2. Step 2: Convert to fraction form
    104,976,129.80/157,464,194.70 = 66,806,856.20/x
  3. Step 3: Cross multiply
    104,976,129.80x = 157,464,194.70 × 66,806,856.20
  4. Step 4: Simplify right side
    104,976,129.80x = 10,519,687,811,971,702
  5. Step 5: Solve for x
    x = 10,519,687,811,971,702/104,976,129.80
  6. Step 6: Final answer
    x = 100,210,284.30

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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.