Home / 139,164,789-208,655,044.92-66,392,801.40

Finding the Fourth Proportional to 139,164,789, 208,655,044.92 and 66,392,801.40

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Solution

The fourth proportional to 139,164,789, 208,655,044.92 and 66,392,801.40 is: 99,545,244.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,164,789 : 208,655,044.92 = 66,392,801.40 : x
  2. Step 2: Convert to fraction form
    139,164,789/208,655,044.92 = 66,392,801.40/x
  3. Step 3: Cross multiply
    139,164,789x = 208,655,044.92 × 66,392,801.40
  4. Step 4: Simplify right side
    139,164,789x = 13,853,192,958,481,638
  5. Step 5: Solve for x
    x = 13,853,192,958,481,638/139,164,789
  6. Step 6: Final answer
    x = 99,545,244.58

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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.