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Finding the Fourth Proportional to 103,959,432.80, 155,771,187.60 and 65,552,213.60

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Solution

The fourth proportional to 103,959,432.80, 155,771,187.60 and 65,552,213.60 is: 98,222,411.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,959,432.80 : 155,771,187.60 = 65,552,213.60 : x
  2. Step 2: Convert to fraction form
    103,959,432.80/155,771,187.60 = 65,552,213.60/x
  3. Step 3: Cross multiply
    103,959,432.80x = 155,771,187.60 × 65,552,213.60
  4. Step 4: Simplify right side
    103,959,432.80x = 10,211,146,162,280,872
  5. Step 5: Solve for x
    x = 10,211,146,162,280,872/103,959,432.80
  6. Step 6: Final answer
    x = 98,222,411.25

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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.