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Finding the Fourth Proportional to 55,985.80, 78,483.80 and 55,985.80

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Solution

The fourth proportional to 55,985.80, 78,483.80 and 55,985.80 is: 78,483.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,985.80 : 78,483.80 = 55,985.80 : x
  2. Step 2: Convert to fraction form
    55,985.80/78,483.80 = 55,985.80/x
  3. Step 3: Cross multiply
    55,985.80x = 78,483.80 × 55,985.80
  4. Step 4: Simplify right side
    55,985.80x = 4,393,978,330.04
  5. Step 5: Solve for x
    x = 4,393,978,330.04/55,985.80
  6. Step 6: Final answer
    x = 78,483.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.