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Finding the Fourth Proportional to 90,004.40, 135,006.60 and 86,548.40

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Solution

The fourth proportional to 90,004.40, 135,006.60 and 86,548.40 is: 129,822.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,004.40 : 135,006.60 = 86,548.40 : x
  2. Step 2: Convert to fraction form
    90,004.40/135,006.60 = 86,548.40/x
  3. Step 3: Cross multiply
    90,004.40x = 135,006.60 × 86,548.40
  4. Step 4: Simplify right side
    90,004.40x = 11,684,605,219.44
  5. Step 5: Solve for x
    x = 11,684,605,219.44/90,004.40
  6. Step 6: Final answer
    x = 129,822.60

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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.