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Finding the Fourth Proportional to 85,897.20, 128,855.40 and 26,732.40

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Solution

The fourth proportional to 85,897.20, 128,855.40 and 26,732.40 is: 40,101.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,897.20 : 128,855.40 = 26,732.40 : x
  2. Step 2: Convert to fraction form
    85,897.20/128,855.40 = 26,732.40/x
  3. Step 3: Cross multiply
    85,897.20x = 128,855.40 × 26,732.40
  4. Step 4: Simplify right side
    85,897.20x = 3,444,614,094.96
  5. Step 5: Solve for x
    x = 3,444,614,094.96/85,897.20
  6. Step 6: Final answer
    x = 40,101.59

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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.