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Finding the Fourth Proportional to 98,687.19, 136,188.08 and 55,666.54

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Solution

The fourth proportional to 98,687.19, 136,188.08 and 55,666.54 is: 76,819.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,687.19 : 136,188.08 = 55,666.54 : x
  2. Step 2: Convert to fraction form
    98,687.19/136,188.08 = 55,666.54/x
  3. Step 3: Cross multiply
    98,687.19x = 136,188.08 × 55,666.54
  4. Step 4: Simplify right side
    98,687.19x = 7,581,118,521.90
  5. Step 5: Solve for x
    x = 7,581,118,521.90/98,687.19
  6. Step 6: Final answer
    x = 76,819.68

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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.