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Finding the Fourth Proportional to 103,703,798.40, 155,456,164.80 and 80,661,955.20

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Solution

The fourth proportional to 103,703,798.40, 155,456,164.80 and 80,661,955.20 is: 120,915,515.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,703,798.40 : 155,456,164.80 = 80,661,955.20 : x
  2. Step 2: Convert to fraction form
    103,703,798.40/155,456,164.80 = 80,661,955.20/x
  3. Step 3: Cross multiply
    103,703,798.40x = 155,456,164.80 × 80,661,955.20
  4. Step 4: Simplify right side
    103,703,798.40x = 12,539,398,200,661,418
  5. Step 5: Solve for x
    x = 12,539,398,200,661,418/103,703,798.40
  6. Step 6: Final answer
    x = 120,915,515.09

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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.