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Finding the Fourth Proportional to 55,920, 83,862.08 and 18,471.36

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Solution

The fourth proportional to 55,920, 83,862.08 and 18,471.36 is: 27,701.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,920 : 83,862.08 = 18,471.36 : x
  2. Step 2: Convert to fraction form
    55,920/83,862.08 = 18,471.36/x
  3. Step 3: Cross multiply
    55,920x = 83,862.08 × 18,471.36
  4. Step 4: Simplify right side
    55,920x = 1,549,046,670.03
  5. Step 5: Solve for x
    x = 1,549,046,670.03/55,920
  6. Step 6: Final answer
    x = 27,701.12

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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.