Home / 74,419.20-111,646.80-21,830.40

Finding the Fourth Proportional to 74,419.20, 111,646.80 and 21,830.40

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Solution

The fourth proportional to 74,419.20, 111,646.80 and 21,830.40 is: 32,750.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,419.20 : 111,646.80 = 21,830.40 : x
  2. Step 2: Convert to fraction form
    74,419.20/111,646.80 = 21,830.40/x
  3. Step 3: Cross multiply
    74,419.20x = 111,646.80 × 21,830.40
  4. Step 4: Simplify right side
    74,419.20x = 2,437,294,302.72
  5. Step 5: Solve for x
    x = 2,437,294,302.72/74,419.20
  6. Step 6: Final answer
    x = 32,750.88

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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.