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Finding the Fourth Proportional to 268,209.92, 402,315.84 and 90,718.40

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Solution

The fourth proportional to 268,209.92, 402,315.84 and 90,718.40 is: 136,077.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,209.92 : 402,315.84 = 90,718.40 : x
  2. Step 2: Convert to fraction form
    268,209.92/402,315.84 = 90,718.40/x
  3. Step 3: Cross multiply
    268,209.92x = 402,315.84 × 90,718.40
  4. Step 4: Simplify right side
    268,209.92x = 36,497,449,299.46
  5. Step 5: Solve for x
    x = 36,497,449,299.46/268,209.92
  6. Step 6: Final answer
    x = 136,077.92

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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.