Home / 85,805,912.20-128,758,634.70-31,958,667.40

Finding the Fourth Proportional to 85,805,912.20, 128,758,634.70 and 31,958,667.40

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Solution

The fourth proportional to 85,805,912.20, 128,758,634.70 and 31,958,667.40 is: 47,956,536.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,805,912.20 : 128,758,634.70 = 31,958,667.40 : x
  2. Step 2: Convert to fraction form
    85,805,912.20/128,758,634.70 = 31,958,667.40/x
  3. Step 3: Cross multiply
    85,805,912.20x = 128,758,634.70 × 31,958,667.40
  4. Step 4: Simplify right side
    85,805,912.20x = 4,114,954,381,255,398.50
  5. Step 5: Solve for x
    x = 4,114,954,381,255,398.50/85,805,912.20
  6. Step 6: Final answer
    x = 47,956,536.74

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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.