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Finding the Fourth Proportional to 201,208,625.70, 301,812,938.55 and 71,820,456.90

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Solution

The fourth proportional to 201,208,625.70, 301,812,938.55 and 71,820,456.90 is: 107,730,685.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,208,625.70 : 301,812,938.55 = 71,820,456.90 : x
  2. Step 2: Convert to fraction form
    201,208,625.70/301,812,938.55 = 71,820,456.90/x
  3. Step 3: Cross multiply
    201,208,625.70x = 301,812,938.55 × 71,820,456.90
  4. Step 4: Simplify right side
    201,208,625.70x = 21,676,343,144,992,628
  5. Step 5: Solve for x
    x = 21,676,343,144,992,628/201,208,625.70
  6. Step 6: Final answer
    x = 107,730,685.35

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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.