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Finding the Fourth Proportional to 99,181.76, 136,870.34 and 53,859.36

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Solution

The fourth proportional to 99,181.76, 136,870.34 and 53,859.36 is: 74,325.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,181.76 : 136,870.34 = 53,859.36 : x
  2. Step 2: Convert to fraction form
    99,181.76/136,870.34 = 53,859.36/x
  3. Step 3: Cross multiply
    99,181.76x = 136,870.34 × 53,859.36
  4. Step 4: Simplify right side
    99,181.76x = 7,371,748,915.38
  5. Step 5: Solve for x
    x = 7,371,748,915.38/99,181.76
  6. Step 6: Final answer
    x = 74,325.65

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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.