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Finding the Fourth Proportional to 85,897.27, 128,858.06 and 33,312.07

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Solution

The fourth proportional to 85,897.27, 128,858.06 and 33,312.07 is: 49,972.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,897.27 : 128,858.06 = 33,312.07 : x
  2. Step 2: Convert to fraction form
    85,897.27/128,858.06 = 33,312.07/x
  3. Step 3: Cross multiply
    85,897.27x = 128,858.06 × 33,312.07
  4. Step 4: Simplify right side
    85,897.27x = 4,292,528,714.78
  5. Step 5: Solve for x
    x = 4,292,528,714.78/85,897.27
  6. Step 6: Final answer
    x = 49,972.82

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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.