Home / 42,167.20-63,308.40-21,405.28

Finding the Fourth Proportional to 42,167.20, 63,308.40 and 21,405.28

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Solution

The fourth proportional to 42,167.20, 63,308.40 and 21,405.28 is: 32,137.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,167.20 : 63,308.40 = 21,405.28 : x
  2. Step 2: Convert to fraction form
    42,167.20/63,308.40 = 21,405.28/x
  3. Step 3: Cross multiply
    42,167.20x = 63,308.40 × 21,405.28
  4. Step 4: Simplify right side
    42,167.20x = 1,355,134,028.35
  5. Step 5: Solve for x
    x = 1,355,134,028.35/42,167.20
  6. Step 6: Final answer
    x = 32,137.16

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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.