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Finding the Fourth Proportional to 85,894.39, 128,897.06 and 33,303.88

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Solution

The fourth proportional to 85,894.39, 128,897.06 and 33,303.88 is: 49,977.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,894.39 : 128,897.06 = 33,303.88 : x
  2. Step 2: Convert to fraction form
    85,894.39/128,897.06 = 33,303.88/x
  3. Step 3: Cross multiply
    85,894.39x = 128,897.06 × 33,303.88
  4. Step 4: Simplify right side
    85,894.39x = 4,292,771,488.15
  5. Step 5: Solve for x
    x = 4,292,771,488.15/85,894.39
  6. Step 6: Final answer
    x = 49,977.32

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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.