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Finding the Fourth Proportional to 57,854,646.79, 86,781,731.67 and 20,957,897.32

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Solution

The fourth proportional to 57,854,646.79, 86,781,731.67 and 20,957,897.32 is: 31,436,759.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,854,646.79 : 86,781,731.67 = 20,957,897.32 : x
  2. Step 2: Convert to fraction form
    57,854,646.79/86,781,731.67 = 20,957,897.32/x
  3. Step 3: Cross multiply
    57,854,646.79x = 86,781,731.67 × 20,957,897.32
  4. Step 4: Simplify right side
    57,854,646.79x = 1,818,762,621,374,697.75
  5. Step 5: Solve for x
    x = 1,818,762,621,374,697.75/57,854,646.79
  6. Step 6: Final answer
    x = 31,436,759.58

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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.