Home / 153,855.09-212,330.70-85,885.43

Finding the Fourth Proportional to 153,855.09, 212,330.70 and 85,885.43

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Solution

The fourth proportional to 153,855.09, 212,330.70 and 85,885.43 is: 118,527.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,855.09 : 212,330.70 = 85,885.43 : x
  2. Step 2: Convert to fraction form
    153,855.09/212,330.70 = 85,885.43/x
  3. Step 3: Cross multiply
    153,855.09x = 212,330.70 × 85,885.43
  4. Step 4: Simplify right side
    153,855.09x = 18,236,112,410.05
  5. Step 5: Solve for x
    x = 18,236,112,410.05/153,855.09
  6. Step 6: Final answer
    x = 118,527.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.