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Finding the Fourth Proportional to 90,809.66, 136,213.12 and 40,854.48

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Solution

The fourth proportional to 90,809.66, 136,213.12 and 40,854.48 is: 61,281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,809.66 : 136,213.12 = 40,854.48 : x
  2. Step 2: Convert to fraction form
    90,809.66/136,213.12 = 40,854.48/x
  3. Step 3: Cross multiply
    90,809.66x = 136,213.12 × 40,854.48
  4. Step 4: Simplify right side
    90,809.66x = 5,564,915,612.14
  5. Step 5: Solve for x
    x = 5,564,915,612.14/90,809.66
  6. Step 6: Final answer
    x = 61,281.10

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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.