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Finding the Fourth Proportional to 86,206,959.80, 129,310,439.72 and 86,206,959.80

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Solution

The fourth proportional to 86,206,959.80, 129,310,439.72 and 86,206,959.80 is: 129,310,439.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,206,959.80 : 129,310,439.72 = 86,206,959.80 : x
  2. Step 2: Convert to fraction form
    86,206,959.80/129,310,439.72 = 86,206,959.80/x
  3. Step 3: Cross multiply
    86,206,959.80x = 129,310,439.72 × 86,206,959.80
  4. Step 4: Simplify right side
    86,206,959.80x = 11,147,459,878,662,362
  5. Step 5: Solve for x
    x = 11,147,459,878,662,362/86,206,959.80
  6. Step 6: Final answer
    x = 129,310,439.72

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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.