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Finding the Fourth Proportional to 92,894.91, 128,205.90 and 55,169.16

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Solution

The fourth proportional to 92,894.91, 128,205.90 and 55,169.16 is: 76,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,894.91 : 128,205.90 = 55,169.16 : x
  2. Step 2: Convert to fraction form
    92,894.91/128,205.90 = 55,169.16/x
  3. Step 3: Cross multiply
    92,894.91x = 128,205.90 × 55,169.16
  4. Step 4: Simplify right side
    92,894.91x = 7,073,011,810.04
  5. Step 5: Solve for x
    x = 7,073,011,810.04/92,894.91
  6. Step 6: Final answer
    x = 76,139.93

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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.