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Finding the Fourth Proportional to 258,897,829.80, 388,346,744.70 and 67,421,605.80

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Solution

The fourth proportional to 258,897,829.80, 388,346,744.70 and 67,421,605.80 is: 101,132,408.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,897,829.80 : 388,346,744.70 = 67,421,605.80 : x
  2. Step 2: Convert to fraction form
    258,897,829.80/388,346,744.70 = 67,421,605.80/x
  3. Step 3: Cross multiply
    258,897,829.80x = 388,346,744.70 × 67,421,605.80
  4. Step 4: Simplify right side
    258,897,829.80x = 26,182,961,134,876,636
  5. Step 5: Solve for x
    x = 26,182,961,134,876,636/258,897,829.80
  6. Step 6: Final answer
    x = 101,132,408.70

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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.