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Finding the Fourth Proportional to 85,364.10, 128,046.15 and 74,996.10

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Solution

The fourth proportional to 85,364.10, 128,046.15 and 74,996.10 is: 112,494.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,364.10 : 128,046.15 = 74,996.10 : x
  2. Step 2: Convert to fraction form
    85,364.10/128,046.15 = 74,996.10/x
  3. Step 3: Cross multiply
    85,364.10x = 128,046.15 × 74,996.10
  4. Step 4: Simplify right side
    85,364.10x = 9,602,961,870.02
  5. Step 5: Solve for x
    x = 9,602,961,870.02/85,364.10
  6. Step 6: Final answer
    x = 112,494.15

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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.