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Finding the Fourth Proportional to 70,840, 97,759.20 and 39,008.82

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Solution

The fourth proportional to 70,840, 97,759.20 and 39,008.82 is: 53,832.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,840 : 97,759.20 = 39,008.82 : x
  2. Step 2: Convert to fraction form
    70,840/97,759.20 = 39,008.82/x
  3. Step 3: Cross multiply
    70,840x = 97,759.20 × 39,008.82
  4. Step 4: Simplify right side
    70,840x = 3,813,471,036.14
  5. Step 5: Solve for x
    x = 3,813,471,036.14/70,840
  6. Step 6: Final answer
    x = 53,832.17

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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.