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Finding the Fourth Proportional to 85,886.76, 128,868.48 and 33,300.35

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Solution

The fourth proportional to 85,886.76, 128,868.48 and 33,300.35 is: 49,965.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,886.76 : 128,868.48 = 33,300.35 : x
  2. Step 2: Convert to fraction form
    85,886.76/128,868.48 = 33,300.35/x
  3. Step 3: Cross multiply
    85,886.76x = 128,868.48 × 33,300.35
  4. Step 4: Simplify right side
    85,886.76x = 4,291,364,677.12
  5. Step 5: Solve for x
    x = 4,291,364,677.12/85,886.76
  6. Step 6: Final answer
    x = 49,965.38

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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.