Home / 257,889,439.20-386,834,158.80-128,749,276.20

Finding the Fourth Proportional to 257,889,439.20, 386,834,158.80 and 128,749,276.20

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Solution

The fourth proportional to 257,889,439.20, 386,834,158.80 and 128,749,276.20 is: 193,123,914.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,889,439.20 : 386,834,158.80 = 128,749,276.20 : x
  2. Step 2: Convert to fraction form
    257,889,439.20/386,834,158.80 = 128,749,276.20/x
  3. Step 3: Cross multiply
    257,889,439.20x = 386,834,158.80 × 128,749,276.20
  4. Step 4: Simplify right side
    257,889,439.20x = 49,804,617,954,935,864
  5. Step 5: Solve for x
    x = 49,804,617,954,935,864/257,889,439.20
  6. Step 6: Final answer
    x = 193,123,914.30

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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.