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Finding the Fourth Proportional to 78,480,016.30, 117,741,019.65 and 55,805,200.30

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Solution

The fourth proportional to 78,480,016.30, 117,741,019.65 and 55,805,200.30 is: 83,722,729.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,480,016.30 : 117,741,019.65 = 55,805,200.30 : x
  2. Step 2: Convert to fraction form
    78,480,016.30/117,741,019.65 = 55,805,200.30/x
  3. Step 3: Cross multiply
    78,480,016.30x = 117,741,019.65 × 55,805,200.30
  4. Step 4: Simplify right side
    78,480,016.30x = 6,570,561,185,094,486
  5. Step 5: Solve for x
    x = 6,570,561,185,094,486/78,480,016.30
  6. Step 6: Final answer
    x = 83,722,729.62

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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.