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Finding the Fourth Proportional to 90,914.97, 136,393.91 and 28,585.47

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Solution

The fourth proportional to 90,914.97, 136,393.91 and 28,585.47 is: 42,884.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,914.97 : 136,393.91 = 28,585.47 : x
  2. Step 2: Convert to fraction form
    90,914.97/136,393.91 = 28,585.47/x
  3. Step 3: Cross multiply
    90,914.97x = 136,393.91 × 28,585.47
  4. Step 4: Simplify right side
    90,914.97x = 3,898,884,022.49
  5. Step 5: Solve for x
    x = 3,898,884,022.49/90,914.97
  6. Step 6: Final answer
    x = 42,884.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.