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Finding the Fourth Proportional to 81,478,020.05, 122,217,030.08 and 81,478,020.05

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Solution

The fourth proportional to 81,478,020.05, 122,217,030.08 and 81,478,020.05 is: 122,217,030.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,478,020.05 : 122,217,030.08 = 81,478,020.05 : x
  2. Step 2: Convert to fraction form
    81,478,020.05/122,217,030.08 = 81,478,020.05/x
  3. Step 3: Cross multiply
    81,478,020.05x = 122,217,030.08 × 81,478,020.05
  4. Step 4: Simplify right side
    81,478,020.05x = 9,958,001,626,902,302
  5. Step 5: Solve for x
    x = 9,958,001,626,902,302/81,478,020.05
  6. Step 6: Final answer
    x = 122,217,030.08

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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.