Home / 85,381.10-128,090.68-26,222.76

Finding the Fourth Proportional to 85,381.10, 128,090.68 and 26,222.76

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Solution

The fourth proportional to 85,381.10, 128,090.68 and 26,222.76 is: 39,339.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,381.10 : 128,090.68 = 26,222.76 : x
  2. Step 2: Convert to fraction form
    85,381.10/128,090.68 = 26,222.76/x
  3. Step 3: Cross multiply
    85,381.10x = 128,090.68 × 26,222.76
  4. Step 4: Simplify right side
    85,381.10x = 3,358,891,159.88
  5. Step 5: Solve for x
    x = 3,358,891,159.88/85,381.10
  6. Step 6: Final answer
    x = 39,339.98

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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.