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Finding the Fourth Proportional to 66,433,959.80, 99,650,939.70 and 55,663,422.20

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Solution

The fourth proportional to 66,433,959.80, 99,650,939.70 and 55,663,422.20 is: 83,495,133.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,433,959.80 : 99,650,939.70 = 55,663,422.20 : x
  2. Step 2: Convert to fraction form
    66,433,959.80/99,650,939.70 = 55,663,422.20/x
  3. Step 3: Cross multiply
    66,433,959.80x = 99,650,939.70 × 55,663,422.20
  4. Step 4: Simplify right side
    66,433,959.80x = 5,546,912,329,147,842
  5. Step 5: Solve for x
    x = 5,546,912,329,147,842/66,433,959.80
  6. Step 6: Final answer
    x = 83,495,133.30

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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.