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Finding the Fourth Proportional to 92,880.52, 128,207.82 and 55,154.50

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Solution

The fourth proportional to 92,880.52, 128,207.82 and 55,154.50 is: 76,132.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,880.52 : 128,207.82 = 55,154.50 : x
  2. Step 2: Convert to fraction form
    92,880.52/128,207.82 = 55,154.50/x
  3. Step 3: Cross multiply
    92,880.52x = 128,207.82 × 55,154.50
  4. Step 4: Simplify right side
    92,880.52x = 7,071,238,208.19
  5. Step 5: Solve for x
    x = 7,071,238,208.19/92,880.52
  6. Step 6: Final answer
    x = 76,132.63

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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.