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Finding the Fourth Proportional to 55,981.80, 83,970.90 and 18,543.60

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Solution

The fourth proportional to 55,981.80, 83,970.90 and 18,543.60 is: 27,814.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,981.80 : 83,970.90 = 18,543.60 : x
  2. Step 2: Convert to fraction form
    55,981.80/83,970.90 = 18,543.60/x
  3. Step 3: Cross multiply
    55,981.80x = 83,970.90 × 18,543.60
  4. Step 4: Simplify right side
    55,981.80x = 1,557,122,781.24
  5. Step 5: Solve for x
    x = 1,557,122,781.24/55,981.80
  6. Step 6: Final answer
    x = 27,814.80

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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.