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Finding the Fourth Proportional to 136,429.60, 204,666.80 and 42,912.80

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Solution

The fourth proportional to 136,429.60, 204,666.80 and 42,912.80 is: 64,376.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,429.60 : 204,666.80 = 42,912.80 : x
  2. Step 2: Convert to fraction form
    136,429.60/204,666.80 = 42,912.80/x
  3. Step 3: Cross multiply
    136,429.60x = 204,666.80 × 42,912.80
  4. Step 4: Simplify right side
    136,429.60x = 8,782,825,455.04
  5. Step 5: Solve for x
    x = 8,782,825,455.04/136,429.60
  6. Step 6: Final answer
    x = 64,376.25

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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.