Home / 102,809.85-154,839.08-90,492.18

Finding the Fourth Proportional to 102,809.85, 154,839.08 and 90,492.18

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Solution

The fourth proportional to 102,809.85, 154,839.08 and 90,492.18 is: 136,287.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,809.85 : 154,839.08 = 90,492.18 : x
  2. Step 2: Convert to fraction form
    102,809.85/154,839.08 = 90,492.18/x
  3. Step 3: Cross multiply
    102,809.85x = 154,839.08 × 90,492.18
  4. Step 4: Simplify right side
    102,809.85x = 14,011,725,898.39
  5. Step 5: Solve for x
    x = 14,011,725,898.39/102,809.85
  6. Step 6: Final answer
    x = 136,287.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.