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Finding the Fourth Proportional to 257,070.34, 385,601.38 and 70,081.84

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Solution

The fourth proportional to 257,070.34, 385,601.38 and 70,081.84 is: 105,121.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,070.34 : 385,601.38 = 70,081.84 : x
  2. Step 2: Convert to fraction form
    257,070.34/385,601.38 = 70,081.84/x
  3. Step 3: Cross multiply
    257,070.34x = 385,601.38 × 70,081.84
  4. Step 4: Simplify right side
    257,070.34x = 27,023,654,216.94
  5. Step 5: Solve for x
    x = 27,023,654,216.94/257,070.34
  6. Step 6: Final answer
    x = 105,121.63

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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.