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Finding the Fourth Proportional to 55,430.80, 83,138.10 and 15,983.80

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Solution

The fourth proportional to 55,430.80, 83,138.10 and 15,983.80 is: 23,973.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,430.80 : 83,138.10 = 15,983.80 : x
  2. Step 2: Convert to fraction form
    55,430.80/83,138.10 = 15,983.80/x
  3. Step 3: Cross multiply
    55,430.80x = 83,138.10 × 15,983.80
  4. Step 4: Simplify right side
    55,430.80x = 1,328,862,762.78
  5. Step 5: Solve for x
    x = 1,328,862,762.78/55,430.80
  6. Step 6: Final answer
    x = 23,973.36

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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.