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Finding the Fourth Proportional to 257,190.40, 385,785.60 and 88,710.40

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Solution

The fourth proportional to 257,190.40, 385,785.60 and 88,710.40 is: 133,065.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,190.40 : 385,785.60 = 88,710.40 : x
  2. Step 2: Convert to fraction form
    257,190.40/385,785.60 = 88,710.40/x
  3. Step 3: Cross multiply
    257,190.40x = 385,785.60 × 88,710.40
  4. Step 4: Simplify right side
    257,190.40x = 34,223,194,890.24
  5. Step 5: Solve for x
    x = 34,223,194,890.24/257,190.40
  6. Step 6: Final answer
    x = 133,065.60

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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.