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Finding the Fourth Proportional to 138,018,843.60, 206,852,430.60 and 73,353,627.60

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Solution

The fourth proportional to 138,018,843.60, 206,852,430.60 and 73,353,627.60 is: 109,936,989.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,018,843.60 : 206,852,430.60 = 73,353,627.60 : x
  2. Step 2: Convert to fraction form
    138,018,843.60/206,852,430.60 = 73,353,627.60/x
  3. Step 3: Cross multiply
    138,018,843.60x = 206,852,430.60 × 73,353,627.60
  4. Step 4: Simplify right side
    138,018,843.60x = 15,173,376,162,387,242
  5. Step 5: Solve for x
    x = 15,173,376,162,387,242/138,018,843.60
  6. Step 6: Final answer
    x = 109,936,989.52

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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.