Home / 121,420.25-182,156.29-42,539.21

Finding the Fourth Proportional to 121,420.25, 182,156.29 and 42,539.21

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Solution

The fourth proportional to 121,420.25, 182,156.29 and 42,539.21 is: 63,817.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,420.25 : 182,156.29 = 42,539.21 : x
  2. Step 2: Convert to fraction form
    121,420.25/182,156.29 = 42,539.21/x
  3. Step 3: Cross multiply
    121,420.25x = 182,156.29 × 42,539.21
  4. Step 4: Simplify right side
    121,420.25x = 7,748,784,578.37
  5. Step 5: Solve for x
    x = 7,748,784,578.37/121,420.25
  6. Step 6: Final answer
    x = 63,817.89

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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.