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Finding the Fourth Proportional to 113,087.80, 169,631.70 and 71,097.40

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Solution

The fourth proportional to 113,087.80, 169,631.70 and 71,097.40 is: 106,646.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,087.80 : 169,631.70 = 71,097.40 : x
  2. Step 2: Convert to fraction form
    113,087.80/169,631.70 = 71,097.40/x
  3. Step 3: Cross multiply
    113,087.80x = 169,631.70 × 71,097.40
  4. Step 4: Simplify right side
    113,087.80x = 12,060,372,827.58
  5. Step 5: Solve for x
    x = 12,060,372,827.58/113,087.80
  6. Step 6: Final answer
    x = 106,646.10

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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.