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Finding the Fourth Proportional to 57,978,537.80, 86,978,304.30 and 29,152,128.20

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Solution

The fourth proportional to 57,978,537.80, 86,978,304.30 and 29,152,128.20 is: 43,733,470.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,978,537.80 : 86,978,304.30 = 29,152,128.20 : x
  2. Step 2: Convert to fraction form
    57,978,537.80/86,978,304.30 = 29,152,128.20/x
  3. Step 3: Cross multiply
    57,978,537.80x = 86,978,304.30 × 29,152,128.20
  4. Step 4: Simplify right side
    57,978,537.80x = 2,535,602,677,572,211
  5. Step 5: Solve for x
    x = 2,535,602,677,572,211/57,978,537.80
  6. Step 6: Final answer
    x = 43,733,470.59

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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.