Home / 90,809.84-136,213.40-40,854.66

Finding the Fourth Proportional to 90,809.84, 136,213.40 and 40,854.66

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Solution

The fourth proportional to 90,809.84, 136,213.40 and 40,854.66 is: 61,281.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,809.84 : 136,213.40 = 40,854.66 : x
  2. Step 2: Convert to fraction form
    90,809.84/136,213.40 = 40,854.66/x
  3. Step 3: Cross multiply
    90,809.84x = 136,213.40 × 40,854.66
  4. Step 4: Simplify right side
    90,809.84x = 5,564,952,604.18
  5. Step 5: Solve for x
    x = 5,564,952,604.18/90,809.84
  6. Step 6: Final answer
    x = 61,281.38

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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.