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Finding the Fourth Proportional to 74,038.80, 111,058.20 and 71,851.80

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Solution

The fourth proportional to 74,038.80, 111,058.20 and 71,851.80 is: 107,777.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,038.80 : 111,058.20 = 71,851.80 : x
  2. Step 2: Convert to fraction form
    74,038.80/111,058.20 = 71,851.80/x
  3. Step 3: Cross multiply
    74,038.80x = 111,058.20 × 71,851.80
  4. Step 4: Simplify right side
    74,038.80x = 7,979,731,574.76
  5. Step 5: Solve for x
    x = 7,979,731,574.76/74,038.80
  6. Step 6: Final answer
    x = 107,777.70

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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.