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Finding the Fourth Proportional to 85,853.36, 128,805.96 and 70,994.48

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Solution

The fourth proportional to 85,853.36, 128,805.96 and 70,994.48 is: 106,513.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,853.36 : 128,805.96 = 70,994.48 : x
  2. Step 2: Convert to fraction form
    85,853.36/128,805.96 = 70,994.48/x
  3. Step 3: Cross multiply
    85,853.36x = 128,805.96 × 70,994.48
  4. Step 4: Simplify right side
    85,853.36x = 9,144,512,151.10
  5. Step 5: Solve for x
    x = 9,144,512,151.10/85,853.36
  6. Step 6: Final answer
    x = 106,513.15

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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.