Home / 128,304,005.60-192,456,008.40-115,314,975.20

Finding the Fourth Proportional to 128,304,005.60, 192,456,008.40 and 115,314,975.20

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Solution

The fourth proportional to 128,304,005.60, 192,456,008.40 and 115,314,975.20 is: 172,972,462.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304,005.60 : 192,456,008.40 = 115,314,975.20 : x
  2. Step 2: Convert to fraction form
    128,304,005.60/192,456,008.40 = 115,314,975.20/x
  3. Step 3: Cross multiply
    128,304,005.60x = 192,456,008.40 × 115,314,975.20
  4. Step 4: Simplify right side
    128,304,005.60x = 22,193,059,835,736,992
  5. Step 5: Solve for x
    x = 22,193,059,835,736,992/128,304,005.60
  6. Step 6: Final answer
    x = 172,972,462.80

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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.