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Finding the Fourth Proportional to 268,210.92, 402,317.34 and 90,719.40

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Solution

The fourth proportional to 268,210.92, 402,317.34 and 90,719.40 is: 136,079.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,210.92 : 402,317.34 = 90,719.40 : x
  2. Step 2: Convert to fraction form
    268,210.92/402,317.34 = 90,719.40/x
  3. Step 3: Cross multiply
    268,210.92x = 402,317.34 × 90,719.40
  4. Step 4: Simplify right side
    268,210.92x = 36,497,987,694.40
  5. Step 5: Solve for x
    x = 36,497,987,694.40/268,210.92
  6. Step 6: Final answer
    x = 136,079.42

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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.