Home / 257,889,818.45-386,834,727.68-128,749,655.45

Finding the Fourth Proportional to 257,889,818.45, 386,834,727.68 and 128,749,655.45

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Solution

The fourth proportional to 257,889,818.45, 386,834,727.68 and 128,749,655.45 is: 193,124,483.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,889,818.45 : 386,834,727.68 = 128,749,655.45 : x
  2. Step 2: Convert to fraction form
    257,889,818.45/386,834,727.68 = 128,749,655.45/x
  3. Step 3: Cross multiply
    257,889,818.45x = 386,834,727.68 × 128,749,655.45
  4. Step 4: Simplify right side
    257,889,818.45x = 49,804,837,904,250,832
  5. Step 5: Solve for x
    x = 49,804,837,904,250,832/257,889,818.45
  6. Step 6: Final answer
    x = 193,124,483.18

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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.