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Finding the Fourth Proportional to 85,534.64, 128,269.16 and 29,364.28

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Solution

The fourth proportional to 85,534.64, 128,269.16 and 29,364.28 is: 44,035.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,534.64 : 128,269.16 = 29,364.28 : x
  2. Step 2: Convert to fraction form
    85,534.64/128,269.16 = 29,364.28/x
  3. Step 3: Cross multiply
    85,534.64x = 128,269.16 × 29,364.28
  4. Step 4: Simplify right side
    85,534.64x = 3,766,531,529.60
  5. Step 5: Solve for x
    x = 3,766,531,529.60/85,534.64
  6. Step 6: Final answer
    x = 44,035.16

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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.