Home / 128,763,905.62-193,145,907.62-31,721,499.62

Finding the Fourth Proportional to 128,763,905.62, 193,145,907.62 and 31,721,499.62

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Solution

The fourth proportional to 128,763,905.62, 193,145,907.62 and 31,721,499.62 is: 47,582,261.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,763,905.62 : 193,145,907.62 = 31,721,499.62 : x
  2. Step 2: Convert to fraction form
    128,763,905.62/193,145,907.62 = 31,721,499.62/x
  3. Step 3: Cross multiply
    128,763,905.62x = 193,145,907.62 × 31,721,499.62
  4. Step 4: Simplify right side
    128,763,905.62x = 6,126,877,835,172,385
  5. Step 5: Solve for x
    x = 6,126,877,835,172,385/128,763,905.62
  6. Step 6: Final answer
    x = 47,582,261.55

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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.