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Finding the Fourth Proportional to 121,987.77, 182,936.14 and 42,003.14

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Solution

The fourth proportional to 121,987.77, 182,936.14 and 42,003.14 is: 62,989.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,987.77 : 182,936.14 = 42,003.14 : x
  2. Step 2: Convert to fraction form
    121,987.77/182,936.14 = 42,003.14/x
  3. Step 3: Cross multiply
    121,987.77x = 182,936.14 × 42,003.14
  4. Step 4: Simplify right side
    121,987.77x = 7,683,892,299.48
  5. Step 5: Solve for x
    x = 7,683,892,299.48/121,987.77
  6. Step 6: Final answer
    x = 62,989.04

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1.5x scale

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.