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Finding the Fourth Proportional to 268,667.60, 402,929.40 and 81,628.88

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Solution

The fourth proportional to 268,667.60, 402,929.40 and 81,628.88 is: 122,421.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,667.60 : 402,929.40 = 81,628.88 : x
  2. Step 2: Convert to fraction form
    268,667.60/402,929.40 = 81,628.88/x
  3. Step 3: Cross multiply
    268,667.60x = 402,929.40 × 81,628.88
  4. Step 4: Simplify right side
    268,667.60x = 32,890,675,641.07
  5. Step 5: Solve for x
    x = 32,890,675,641.07/268,667.60
  6. Step 6: Final answer
    x = 122,421.44

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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.