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Finding the Fourth Proportional to 145,235.20, 217,852.80 and 91,969.60

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Solution

The fourth proportional to 145,235.20, 217,852.80 and 91,969.60 is: 137,954.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,235.20 : 217,852.80 = 91,969.60 : x
  2. Step 2: Convert to fraction form
    145,235.20/217,852.80 = 91,969.60/x
  3. Step 3: Cross multiply
    145,235.20x = 217,852.80 × 91,969.60
  4. Step 4: Simplify right side
    145,235.20x = 20,035,834,874.88
  5. Step 5: Solve for x
    x = 20,035,834,874.88/145,235.20
  6. Step 6: Final answer
    x = 137,954.40

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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.