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Finding the Fourth Proportional to 91,363.82, 136,902.11 and 70,278.41

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Solution

The fourth proportional to 91,363.82, 136,902.11 and 70,278.41 is: 105,307.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,363.82 : 136,902.11 = 70,278.41 : x
  2. Step 2: Convert to fraction form
    91,363.82/136,902.11 = 70,278.41/x
  3. Step 3: Cross multiply
    91,363.82x = 136,902.11 × 70,278.41
  4. Step 4: Simplify right side
    91,363.82x = 9,621,262,616.45
  5. Step 5: Solve for x
    x = 9,621,262,616.45/91,363.82
  6. Step 6: Final answer
    x = 105,307.14

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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.