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Finding the Fourth Proportional to 257,150.40, 385,984.80 and 124,137.60

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Solution

The fourth proportional to 257,150.40, 385,984.80 and 124,137.60 is: 186,331.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,150.40 : 385,984.80 = 124,137.60 : x
  2. Step 2: Convert to fraction form
    257,150.40/385,984.80 = 124,137.60/x
  3. Step 3: Cross multiply
    257,150.40x = 385,984.80 × 124,137.60
  4. Step 4: Simplify right side
    257,150.40x = 47,915,226,708.48
  5. Step 5: Solve for x
    x = 47,915,226,708.48/257,150.40
  6. Step 6: Final answer
    x = 186,331.53

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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.