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Finding the Fourth Proportional to 92,885.90, 128,215.24 and 55,159.88

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Solution

The fourth proportional to 92,885.90, 128,215.24 and 55,159.88 is: 76,140.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,885.90 : 128,215.24 = 55,159.88 : x
  2. Step 2: Convert to fraction form
    92,885.90/128,215.24 = 55,159.88/x
  3. Step 3: Cross multiply
    92,885.90x = 128,215.24 × 55,159.88
  4. Step 4: Simplify right side
    92,885.90x = 7,072,336,473.60
  5. Step 5: Solve for x
    x = 7,072,336,473.60/92,885.90
  6. Step 6: Final answer
    x = 76,140.05

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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.