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Finding the Fourth Proportional to 223,140.80, 334,711.20 and 128,662.40

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Solution

The fourth proportional to 223,140.80, 334,711.20 and 128,662.40 is: 192,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,140.80 : 334,711.20 = 128,662.40 : x
  2. Step 2: Convert to fraction form
    223,140.80/334,711.20 = 128,662.40/x
  3. Step 3: Cross multiply
    223,140.80x = 334,711.20 × 128,662.40
  4. Step 4: Simplify right side
    223,140.80x = 43,064,746,298.88
  5. Step 5: Solve for x
    x = 43,064,746,298.88/223,140.80
  6. Step 6: Final answer
    x = 192,993.60

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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.