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Finding the Fourth Proportional to 90,043.36, 135,070.80 and 34,639.36

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Solution

The fourth proportional to 90,043.36, 135,070.80 and 34,639.36 is: 51,961.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,043.36 : 135,070.80 = 34,639.36 : x
  2. Step 2: Convert to fraction form
    90,043.36/135,070.80 = 34,639.36/x
  3. Step 3: Cross multiply
    90,043.36x = 135,070.80 × 34,639.36
  4. Step 4: Simplify right side
    90,043.36x = 4,678,766,066.69
  5. Step 5: Solve for x
    x = 4,678,766,066.69/90,043.36
  6. Step 6: Final answer
    x = 51,961.26

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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.