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Finding the Fourth Proportional to 257,167.80, 385,751.70 and 70,179.30

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Solution

The fourth proportional to 257,167.80, 385,751.70 and 70,179.30 is: 105,268.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,167.80 : 385,751.70 = 70,179.30 : x
  2. Step 2: Convert to fraction form
    257,167.80/385,751.70 = 70,179.30/x
  3. Step 3: Cross multiply
    257,167.80x = 385,751.70 × 70,179.30
  4. Step 4: Simplify right side
    257,167.80x = 27,071,784,279.81
  5. Step 5: Solve for x
    x = 27,071,784,279.81/257,167.80
  6. Step 6: Final answer
    x = 105,268.95

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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.