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Finding the Fourth Proportional to 55,980.40, 83,970.60 and 18,530.40

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Solution

The fourth proportional to 55,980.40, 83,970.60 and 18,530.40 is: 27,795.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,980.40 : 83,970.60 = 18,530.40 : x
  2. Step 2: Convert to fraction form
    55,980.40/83,970.60 = 18,530.40/x
  3. Step 3: Cross multiply
    55,980.40x = 83,970.60 × 18,530.40
  4. Step 4: Simplify right side
    55,980.40x = 1,556,008,806.24
  5. Step 5: Solve for x
    x = 1,556,008,806.24/55,980.40
  6. Step 6: Final answer
    x = 27,795.60

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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.