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Finding the Fourth Proportional to 201,980.60, 302,625.30 and 128,022.20

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Solution

The fourth proportional to 201,980.60, 302,625.30 and 128,022.20 is: 191,814.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,980.60 : 302,625.30 = 128,022.20 : x
  2. Step 2: Convert to fraction form
    201,980.60/302,625.30 = 128,022.20/x
  3. Step 3: Cross multiply
    201,980.60x = 302,625.30 × 128,022.20
  4. Step 4: Simplify right side
    201,980.60x = 38,742,756,681.66
  5. Step 5: Solve for x
    x = 38,742,756,681.66/201,980.60
  6. Step 6: Final answer
    x = 191,814.25

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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.