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Finding the Fourth Proportional to 66,178.80, 99,258.60 and 19,426.80

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Solution

The fourth proportional to 66,178.80, 99,258.60 and 19,426.80 is: 29,137.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,178.80 : 99,258.60 = 19,426.80 : x
  2. Step 2: Convert to fraction form
    66,178.80/99,258.60 = 19,426.80/x
  3. Step 3: Cross multiply
    66,178.80x = 99,258.60 × 19,426.80
  4. Step 4: Simplify right side
    66,178.80x = 1,928,276,970.48
  5. Step 5: Solve for x
    x = 1,928,276,970.48/66,178.80
  6. Step 6: Final answer
    x = 29,137.38

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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.