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Finding the Fourth Proportional to 339,437.71, 509,156.61 and 86,718.79

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Solution

The fourth proportional to 339,437.71, 509,156.61 and 86,718.79 is: 130,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,437.71 : 509,156.61 = 86,718.79 : x
  2. Step 2: Convert to fraction form
    339,437.71/509,156.61 = 86,718.79/x
  3. Step 3: Cross multiply
    339,437.71x = 509,156.61 × 86,718.79
  4. Step 4: Simplify right side
    339,437.71x = 44,153,445,139.70
  5. Step 5: Solve for x
    x = 44,153,445,139.70/339,437.71
  6. Step 6: Final answer
    x = 130,078.20

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Similar ratio
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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.