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Finding the Fourth Proportional to 148,021.40, 222,032.10 and 85,813.40

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Solution

The fourth proportional to 148,021.40, 222,032.10 and 85,813.40 is: 128,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,021.40 : 222,032.10 = 85,813.40 : x
  2. Step 2: Convert to fraction form
    148,021.40/222,032.10 = 85,813.40/x
  3. Step 3: Cross multiply
    148,021.40x = 222,032.10 × 85,813.40
  4. Step 4: Simplify right side
    148,021.40x = 19,053,329,410.14
  5. Step 5: Solve for x
    x = 19,053,329,410.14/148,021.40
  6. Step 6: Final answer
    x = 128,720.10

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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.