Home / 257,139.39-385,454.85-121,966.40

Finding the Fourth Proportional to 257,139.39, 385,454.85 and 121,966.40

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Solution

The fourth proportional to 257,139.39, 385,454.85 and 121,966.40 is: 182,829.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,139.39 : 385,454.85 = 121,966.40 : x
  2. Step 2: Convert to fraction form
    257,139.39/385,454.85 = 121,966.40/x
  3. Step 3: Cross multiply
    257,139.39x = 385,454.85 × 121,966.40
  4. Step 4: Simplify right side
    257,139.39x = 47,012,538,489.77
  5. Step 5: Solve for x
    x = 47,012,538,489.77/257,139.39
  6. Step 6: Final answer
    x = 182,829.00

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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.