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Finding the Fourth Proportional to 105,612.46, 158,041.20 and 91,736.02

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Solution

The fourth proportional to 105,612.46, 158,041.20 and 91,736.02 is: 137,276.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,612.46 : 158,041.20 = 91,736.02 : x
  2. Step 2: Convert to fraction form
    105,612.46/158,041.20 = 91,736.02/x
  3. Step 3: Cross multiply
    105,612.46x = 158,041.20 × 91,736.02
  4. Step 4: Simplify right side
    105,612.46x = 14,498,070,684.02
  5. Step 5: Solve for x
    x = 14,498,070,684.02/105,612.46
  6. Step 6: Final answer
    x = 137,276.14

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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.