Home / 155,939,241.12-215,198,690.27-85,373,660.31

Finding the Fourth Proportional to 155,939,241.12, 215,198,690.27 and 85,373,660.31

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Solution

The fourth proportional to 155,939,241.12, 215,198,690.27 and 85,373,660.31 is: 117,817,040.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,939,241.12 : 215,198,690.27 = 85,373,660.31 : x
  2. Step 2: Convert to fraction form
    155,939,241.12/215,198,690.27 = 85,373,660.31/x
  3. Step 3: Cross multiply
    155,939,241.12x = 215,198,690.27 × 85,373,660.31
  4. Step 4: Simplify right side
    155,939,241.12x = 18,372,299,881,841,012
  5. Step 5: Solve for x
    x = 18,372,299,881,841,012/155,939,241.12
  6. Step 6: Final answer
    x = 117,817,040.47

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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.