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Finding the Fourth Proportional to 148,907.20, 223,360.80 and 85,921.60

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Solution

The fourth proportional to 148,907.20, 223,360.80 and 85,921.60 is: 128,882.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,907.20 : 223,360.80 = 85,921.60 : x
  2. Step 2: Convert to fraction form
    148,907.20/223,360.80 = 85,921.60/x
  3. Step 3: Cross multiply
    148,907.20x = 223,360.80 × 85,921.60
  4. Step 4: Simplify right side
    148,907.20x = 19,191,517,313.28
  5. Step 5: Solve for x
    x = 19,191,517,313.28/148,907.20
  6. Step 6: Final answer
    x = 128,882.40

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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.