Home / 138,737,212.80-208,105,819.20-81,294,345.60

Finding the Fourth Proportional to 138,737,212.80, 208,105,819.20 and 81,294,345.60

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Solution

The fourth proportional to 138,737,212.80, 208,105,819.20 and 81,294,345.60 is: 121,941,518.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,737,212.80 : 208,105,819.20 = 81,294,345.60 : x
  2. Step 2: Convert to fraction form
    138,737,212.80/208,105,819.20 = 81,294,345.60/x
  3. Step 3: Cross multiply
    138,737,212.80x = 208,105,819.20 × 81,294,345.60
  4. Step 4: Simplify right side
    138,737,212.80x = 16,917,826,387,415,914
  5. Step 5: Solve for x
    x = 16,917,826,387,415,914/138,737,212.80
  6. Step 6: Final answer
    x = 121,941,518.40

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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.