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Finding the Fourth Proportional to 128,950.80, 193,426.20 and 40,203.60

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Solution

The fourth proportional to 128,950.80, 193,426.20 and 40,203.60 is: 60,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,950.80 : 193,426.20 = 40,203.60 : x
  2. Step 2: Convert to fraction form
    128,950.80/193,426.20 = 40,203.60/x
  3. Step 3: Cross multiply
    128,950.80x = 193,426.20 × 40,203.60
  4. Step 4: Simplify right side
    128,950.80x = 7,776,429,574.32
  5. Step 5: Solve for x
    x = 7,776,429,574.32/128,950.80
  6. Step 6: Final answer
    x = 60,305.40

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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.