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Finding the Fourth Proportional to 137,626.98, 189,964.53 and 81,070.98

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Solution

The fourth proportional to 137,626.98, 189,964.53 and 81,070.98 is: 111,901.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,626.98 : 189,964.53 = 81,070.98 : x
  2. Step 2: Convert to fraction form
    137,626.98/189,964.53 = 81,070.98/x
  3. Step 3: Cross multiply
    137,626.98x = 189,964.53 × 81,070.98
  4. Step 4: Simplify right side
    137,626.98x = 15,400,610,612.34
  5. Step 5: Solve for x
    x = 15,400,610,612.34/137,626.98
  6. Step 6: Final answer
    x = 111,901.10

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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.