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Finding the Fourth Proportional to 257,118.56, 385,638.24 and 70,144.64

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Solution

The fourth proportional to 257,118.56, 385,638.24 and 70,144.64 is: 105,206.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,118.56 : 385,638.24 = 70,144.64 : x
  2. Step 2: Convert to fraction form
    257,118.56/385,638.24 = 70,144.64/x
  3. Step 3: Cross multiply
    257,118.56x = 385,638.24 × 70,144.64
  4. Step 4: Simplify right side
    257,118.56x = 27,050,455,515.03
  5. Step 5: Solve for x
    x = 27,050,455,515.03/257,118.56
  6. Step 6: Final answer
    x = 105,206.16

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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.