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Finding the Fourth Proportional to 257,099.72, 385,638.30 and 70,110.60

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Solution

The fourth proportional to 257,099.72, 385,638.30 and 70,110.60 is: 105,162.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,099.72 : 385,638.30 = 70,110.60 : x
  2. Step 2: Convert to fraction form
    257,099.72/385,638.30 = 70,110.60/x
  3. Step 3: Cross multiply
    257,099.72x = 385,638.30 × 70,110.60
  4. Step 4: Simplify right side
    257,099.72x = 27,037,332,595.98
  5. Step 5: Solve for x
    x = 27,037,332,595.98/257,099.72
  6. Step 6: Final answer
    x = 105,162.82

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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.