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Finding the Fourth Proportional to 339,547.71, 509,542.71 and 129,187.47

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Solution

The fourth proportional to 339,547.71, 509,542.71 and 129,187.47 is: 193,865.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,547.71 : 509,542.71 = 129,187.47 : x
  2. Step 2: Convert to fraction form
    339,547.71/509,542.71 = 129,187.47/x
  3. Step 3: Cross multiply
    339,547.71x = 509,542.71 × 129,187.47
  4. Step 4: Simplify right side
    339,547.71x = 65,826,533,561.84
  5. Step 5: Solve for x
    x = 65,826,533,561.84/339,547.71
  6. Step 6: Final answer
    x = 193,865.34

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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.