Home / 128,721,918.80-193,092,209.40-77,493,630.80

Finding the Fourth Proportional to 128,721,918.80, 193,092,209.40 and 77,493,630.80

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Solution

The fourth proportional to 128,721,918.80, 193,092,209.40 and 77,493,630.80 is: 116,246,063.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,721,918.80 : 193,092,209.40 = 77,493,630.80 : x
  2. Step 2: Convert to fraction form
    128,721,918.80/193,092,209.40 = 77,493,630.80/x
  3. Step 3: Cross multiply
    128,721,918.80x = 193,092,209.40 × 77,493,630.80
  4. Step 4: Simplify right side
    128,721,918.80x = 14,963,416,385,599,890
  5. Step 5: Solve for x
    x = 14,963,416,385,599,890/128,721,918.80
  6. Step 6: Final answer
    x = 116,246,063.80

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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.