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Finding the Fourth Proportional to 90,020.40, 135,030.60 and 84,836.40

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Solution

The fourth proportional to 90,020.40, 135,030.60 and 84,836.40 is: 127,254.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,020.40 : 135,030.60 = 84,836.40 : x
  2. Step 2: Convert to fraction form
    90,020.40/135,030.60 = 84,836.40/x
  3. Step 3: Cross multiply
    90,020.40x = 135,030.60 × 84,836.40
  4. Step 4: Simplify right side
    90,020.40x = 11,455,509,993.84
  5. Step 5: Solve for x
    x = 11,455,509,993.84/90,020.40
  6. Step 6: Final answer
    x = 127,254.60

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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.